Correct Answer: (a) Mandsaur
Solution:Opium is cultivated in three states of India - Madhya Pradesh, Rajasthan and Uttar Pradesh. Madhya Pradesh is the largest producer of opium in India. Mandsaur district of the state is the sole producer of opium. It is used in medicines. India is the main producer and legal exporter of opium. Apart from Mandsaur opium is also cultivated in Neemuch, Ratlam, Ujjain, Jhabua, Shajapur and Rajgarh districts of Madhya Pradesh.