Which of the following is the world's largest river island?

The correct answer is Majuli . The Guinness World Records has declared Majuli in Assam as the largest river island in the world. It has toppled Marajo in Brazil to clinch the record. The beautiful river island is situated on the Brahmaputra river. Umananda (the river island) also lies in the Brahmaputra River. Additional Information About Assam: Chief Minister - Himanta Biswa Sarma. Capital - Dispur. State Animal - Indian rhinoceros. State Bird - White-winged duck.