This is the correct option as malfunctioning of the immune system of the body, i.e. allergy, is not an extrinsic or external factor that affects human health. It is an internal factor.

This is the correct option. Goitre is an iodine deficiency disease.

This is the correct option. Defective genes passed on from parents to offsprings cause inherited diseases. Organs and tissues wearing away and not working so well with age cause degenerative diseases. Social interaction with family, friends and strangers causes social diseases.

This is the correct option as this statement is false. Cardiovascular disease, tuberculosis and diabetes are a few examples of chronic diseases, and not acute diseases.

This is the correct option as this is not a symptom of malaria.

This is the correct option. Housefly causes typhoid. Sandfly causes kala-azar. Tsetse fly causes sleeping sickness.

This is the correct option. Interferon is used for curing jaundice.

This is the correct option. Complete bed rest should be ensured till the illness is fully controlled. Husk of isabgol seed with water or curd provides relief.

This is the correct option as a disease is a response to environmental factors such as malnutrition, industrial hazards or climate, specific infective agents like worms, protozoans, fungi, bacteria or viruses and inherent defects of the organism such as genetic anomalies. This is a wrong option as environmental factors such as malnutrition, industrial hazards or climate and inherent defects of the organism such as genetic anomalies are also involved.

This is the correct option. Beri-Beri is a disease caused by extrinsic factors. It is caused due to the deficiency of vitamin B1 (Thiamine).

This is the correct option. Kwashiorkor is a protein deficiency disease.

This is the correct option as this is a characteristic of communicable diseases.

This is the correct option. Parasites cause elephantiasis. It is a parasitic infection that causes extreme swelling in the arms and legs.

This is the correct option as all of the above are the measures adopted to prevent an infectious disease.

This is the correct option as this is not a symptom of AIDS.

This is the correct option as salmonella causes typhoid. Ascariasis is an infection of the small intestine caused by Ascaris lumbricoides (A. lumbricoides), which is a species of roundworm.

This is the correct option. Rickets is caused by the deficiency of vitamin D.

This is the correct option as all of the above are disease-causing organisms.

This is the correct option. Down syndrome is an example of inherited disease. It occurs when an individual has a full or partial extra copy of chromosome 21.

This is the correct option. AIDS is a disease in which there is a severe loss of the body's weight, swollen lymph nodes, etc. Thus, it is also called 'slim disease'. 

This is the correct option. Fibrosis is not a social disease. It is an inherited disease that is caused due to the defective genes passed on from the parents to the offspring. 

This is the correct option. Arthritis is not a disease caused by extrinsic factors. It is caused by intrinsic factors.

This is the correct option. Thyroid hormone causes myxoderma (in adults). Insulin hormone causes diabetes mellitus. Aldosterone hormone causes Addison's disease.

This is the correct option. Cheilosis is caused by the deficiency of vitamin B₂.

This is the correct option. Pellagra is a vitamin deficiency disease most frequently caused by a chronic lack of niacin (vitamin B₃ or synonym: vitamin PP (From: Pellagra Preventing factor)) in the diet.

This is the correct option. Marasmus is caused due to the deficiency of protein and total food calories. It is different from Kwashiorkor, which is actually caused due to lack of protein in the diet. Marasmus is usually found in very young infants and very young children.

This is the correct option. Common cold is caused by a virus.

This is the correct option. Intestinal infection is caused by worms.

This is the correct option. Acute diseases are those diseases whose symptoms are quickly visible in the body. Congenital diseases are caused due to the genetic abnormalities, metabolic disorders or malfunctioning of any organ. Acquired diseases are those which develop after birth.

This is the correct option as this statement is false. Virus, bacteria and fungi multiply very quickly, but worms multiply very slowly.

This is the correct option as this is not a means of indirect transmission of diseases. It is a means of direct transmission of disease such as AIDS, syphilis, etc.

This is the correct option. C. L. A. Laveran in 1880 discovered the malarial parasite 'plasmodium'.

Although rashes are reported in 2% of the cases in influenza, but it is not a common symptom of influenza. Hence, it is the correct answer.

Rat flea causes bubonic plague. House fly causes conjuctivitis. Aedes mosquito causes dengue.

This is the correct option. The virus of hepatitis B is a blood-borne DNA virus.

This is the correct option. Rabies can be cured by Pasteur's treatment, which was discovered by Louis Pasteur.

This is the correct option as all of the above are the symptoms of tuberculosis.

This is the correct option as all of the above statements are true.

This is the correct option as ciprofloxacin is the drug that is used to cure typhoid.

This is the correct option. World TB Day is celebrated on 24^th March. World Malaria Day is celebrated on 20^th August. World AIDS Day is celebrated on 1^st December.