Concept:The largest river island in the world is determined by its area and location within a river system.
Explanation:Majuli Island is situated in the Brahmaputra River in Assam, India.
It covers approximately 880 sq km, though erosion has reduced its size over time.
Majuli is the largest inhabited river island globally and was declared a district in 2016.
It is a cultural centre known for its Vaishnavite Satras (monastic institutions).
Other options: Srirangam (smaller river island in Kaveri), Bhavani (in Godavari), Agatti (coral island in Lakshadweep).
Answer:Option A – Majuli Island