Which of the following statements about the fertilizer industry in India is/are correct?
1. India is self-sufficient in potash-based fertilizers.
2. Urea is the most commonly produced nitrogenous fertilizer.
3. Fertilizer production increased after the Green Revolution.
4. Gujarat and Kerala are minor contributors to fertilizer production.
AOnly 1 and 3
BOnly 2 and 3
COnly 2 and 4
DOnly 1,2 and 3
