Rajeshwari and Saraswati oilfields are in Barmer district of Rajasthan.

Kalahandi in Orissa, Balaghat in Madhya Pradesh, Srikakulam in Andhra Pradesh and Ratnagiri in Maharashtra are known for the production of manganese.

The first mobile offshore drilling platform, Sagar Samrat was bought from Japan. Digboi in Assam has the distinction of being India's oldest producing oilfield. Digboi oilfield is small in size. Despite being small in size, Digboi reserves have lasted for more than 100 years. The richest oil field in India is at Bombay High.

Copper - Khetri Gold - Kolar Iron - Kudremukh Coal - Jharia

All the given points are the features/advantages of natural gas.

Potato ores are the seed potato grown in Kufri, Himachal Pradesh.

Uranium and thorium are the main atomic minerals which are mostly used in generating nuclear energy. Apart from these two, beryllium lithium and zirconium are other atomic minerals. Although monazite sands which occur in east and west coasts of India have also reserves of uranium. However, the largest concentration of monazite sand is found on the Kerala coast and over 1,50,000 tones of uranium is estimated to be contained in monazite. It is also derived from monazite which contains 10% thorium. It is found along the Kerala coast and in alluvial rocks of Ranchi and Hazaribagh district of Jharkhand.

The production of oil in India goes like this: Bombay High in Maharashtra alone produces more than 65% oil in India Gujarat produces about 17.5% oil in India Assam, despite being the traditional producer of oil, produces only 15% oil in India. Rest of the oil in India is produced by Andhra, Tamil Nadu, Rajasthan and Arunachal Pradesh.

India's gas reserves are - Bombay High and Bassein in Maharashtra (75%), Gujarat (12%), Andhra Pradesh (7%) and Assam (6%).

In 2011, the Oil and Natural Gas Commission had discovered four new fields of natural gas. These are: Andada                        -           Gujarat Adiyakkamanglam        -           Tamil Nadu Koraghat                      -           Assam Linga                           -           Andhra Pradesh

India is the fifth largest exporter of iron ore. India consumes 80% of its manganese production and exports the rest 20%. Despite having large reserves of copper, India imports copper due to decrease in its production trend. India imports bauxite from various countries, mainly from Italy and the UK.

Both the given statements are correct and reason is the correct explanation for assertion. Among the four varieties of coal - Anthracite, bituminous, lignite and peat - the first two varieties are considered superior in quality, while lignite and peat are considered inferior. But, Indian lignite is considered to be better in quality owing to its less ash content.

Orissa is the largest bauxite producing state in India. It produces about 36.8 percent of the country's total bauxite production. Jharkhand is the second largest producer of bauxite in India. In Jharkhand, bauxite deposits are mainly found in Palamau, Ranchi, Gumla and Lohardaga districts.