Buddha Purnima is marked on a full moon day in the Hindu month of ____________.

Correct option is A

The correct answer is (a) Vaisakh.
 Buddha Purnima, also known as Vesak or Buddha Jayanti, commemorates the birth, enlightenment (nirvana), and death (parinirvana) of Gautama Buddha, the founder of Buddhism.
 It falls on the full moon day (Purnima) in the Hindu lunar month of Vaisakh, which usually corresponds to April or May in the Gregorian calendar.
 This day is also known as Thrice Blessed Festival.
 Gautam Buddha was born in Lumbini, Nepal, and died in Kushinagar, Uttar Pradesh.
Facts to remember:
 The Hindu calendar, also known as the Vikram Samvat calendar, is a lunisolar calendar used in Hinduism, with many variations regionally.
 It is based on the movement of the Moon and the Sun, and its months are based on the lunar cycles.
 The calendar begins in the month of Chaitra, which usually falls in March or April in the Gregorian calendar.
 Here are the months of the Hindu calendar with their corresponding Gregorian calendar months:
1. Chaitra - March/April
2. Vaisakha - April/May
3. Jyaistha - May/June
4. Asadha - June/July
5. Sravana - July/August
6. Bhadra - August/September
7. Asvina - September/October
8. Kartika - October/November
9. Agrahayana - November/December
10. Pausa - December/January
11. Magha - January/February
12. Phalguna - February/March