The correct answer is: c) Christianity.
Christianity is the major religion in Meghalaya, with over 70% of the population identifying as Christian. The majority of Christians in Meghalaya are Protestant, with a significant minority of Catholics. The state also has a small Muslim minority, as well as a number of indigenous religions.
Hinduism is the second largest religion in Meghalaya, with around 20% of the population identifying as Hindu. The majority of Hindus in Meghalaya are followers of the Vaishnavite tradition. The state also has a small Shaivite minority, as well as a number of other Hindu sects.
Islam is the third largest religion in Meghalaya, with around 5% of the population identifying as Muslim. The majority of Muslims in Meghalaya are Sunni, with a small Shia minority. The state also has a number of Ahmadiyya Muslims.
Buddhism is the fourth largest religion in Meghalaya, with around 2% of the population identifying as Buddhist. The majority of Buddhists in Meghalaya are followers of the Mahayana tradition. The state also has a small Theravada minority, as well as a number of other Buddhist sects.
The remaining 3% of the population in Meghalaya identifies with other religions, or with no religion at all.