Muslims are the largest religious group in Bangladesh. Option B is correct.
Islam is the largest religion in the Maldives, Afghanistan, Pakistan, and Bangladesh.
In accordance with a study carried out in 2015, Islam has 1.8 billion adherents, making up about 24.1% of the world population. South Asia contains the largest population of Muslims in the world. All the Muslims in the countries of Southeast Asia make up the world's third-largest population of Muslims.