Correct option is B
Majuli is the largest river island in the world and is situated on the Brahmaputra River in the state of Assam. It covers an area of about 880 square kilometers, although its size has reduced over time due to riverbank erosion.
Majuli has been declared a district of Assam and holds cultural significance as a hub of Vaishnavite monasteries (Satras), established by the saint Srimanta Sankardeva. It is also a biodiversity hotspot, home to many rare and migratory bird species.
The Brahmaputra, one of India's major rivers, flows through Tibet, India, and Bangladesh. It is known for its powerful monsoon-driven flows, which often cause flooding, but also sustain the fertile plains of Assam and Bangladesh.
