Correct Option: D

Kushinagar is a town and a nagar panchayat in Kushinagar district in the Indian state of Uttar Pradesh. It is an important Buddhist pilgrimage site, where Gautama Buddha is thought to have attained Parinirvana after his death. It is one of the most important four holy sites for Buddhists. At this location, near the Hiranyavati River, Gautama Buddha attained Parinirvana (or ‘Final Nirvana’) after falling ill from eating a meal of a species of mushroom, or possibly pork.