Pernicious anaemia is one of the obvious symptoms of a cobalt deficiency.

This option is correct because Rubredoxin is a small iron-sulphur protein found in various sulphur-metabolizing bacteria, Rieske proteins are iron-sulphur protein components of cytochrome bc1 complexes and cytochrome b6f complexes which were first discovered and isolated by John S. Rieske and co-workers in 1964 and Aconitase is an iron-sulphur protein that catalyses the interconversion of citrate and isocitrate

Sn (Tin) is present in budotitane and is used to treat cancer. So, this is the correct option.

Micronutrients are nutrients required by humans and other organisms throughout life in small quantities to orchestrate a range of physiological functions. Examples: Mn, Co, Ni, Cu, Zn, V, Cr, Mo, Se, F, I, Al, Pb, Sn and Si.

Selenium is an important constituent of the enzyme glutathione peroxidase, which is responsible for destroying lipid-damaging peroxides.

Ceruloplasmin, a glycoprotein produced in the liver, carries or transports more than 95 percent of the copper in blood plasma.

This option is correct because Mg is present in chlorophyll and helps in photosynthesis, is helpful in activation of enzymes and also an Information carrier.

This option is correct because galactose oxidase is a monomeric enzyme that contains a single copper ion and catalyses the stereospecific oxidation of primary alcohols to their corresponding aldehydes.

This option is correct because urease is a nickel-containing metalloenzyme of high molecular weight that catalyses the hydrolysis of urea into carbon dioxide and ammonia and dopamine β-hydroxylase is a copper-containing enzyme that synthesises norepinephrine from dopamine.

Formaldehyde ferredoxin oxidoreductase is a tungsten containing metalloenzyme.

Correct option: Tetrathiomolybdate is used as an anti copper agent in Hepatolenticular degeneration.

Correct option: Tetrathiomolybdate is used as an anti copper agent in Wilson’s disease.

This option is correct because in an adult male human body water is approximately 57%. The water is 11% hydrogen by mass but 67% by count of atoms (i.e. 67 atomic percent). Thus, most of the mass of the human body is oxygen, but most of the atoms in the human body are hydrogen atoms.

Selenium sulfide is used in anti-dandruff shampoos. Magnesium hydroxide is used as a laxative to relieve occasional constipation and as an antacid to relieve indigestion, sour stomach, and heartburn. Antimony compounds are used as antileishmaniasis agents such as sodium stibogluconate. Stannous fluoride is used as an anti-caries actives.

Lithium salts are widely used to treat bipolar disorder (BPD). The square planar Pt(II) complex, cis-platin is used in the chemotherapy of cancer. Various gold compounds have been used in the treatment of rheumatoid arthritis. All are Au(I) complexes containing thiolate ligands. Bismuth salts are used in the treatment of gastritis.