The correct option is C Kota
Kota fertilizer plant is not in the public sector. Chambal Fertilisers and Chemicals Limited is among the largest private-sector fertilizer producers in India. It was promoted by Zuari Industries Limited in the year 1985 at Kota in Rajasthan. But National Fertilizers Ltd, i.e. NFL was promoted by the Government of India in 1974. NFL had set up fuel oil-based urea plants at Panipat and Bhatinda. And Later, the NFL also set up its plant at Nangal. Fertilizer Corporation of India Ltd is at Gorakhpur. It is also under the public sector set up. Thus the correct answer is Kota means option C.