Which of the following are true with regard to coal in India ?
1. Coal is found in sedimentary rocks.
2. The best quality of coal is lignite.
3. The largest and oldest coalfield in India is Raniganj.
4. The Damodar river valley is popularly known as the ‘Ruhr of India’.
Which of the statements are correct?
(a) 1 and 4 (b) 1, 2 and 3 (c) 1, 3 and 4 (d) 2, 3 and 4
