Hint: India, authoritatively the Republic of India is a country in South Asia. It is the seventh-biggest country by region, the second-most crowded nation, and the most crowded popular government on the planet.
India's characterizing geographical cycles started 75 million years prior when the Indian Plate, then, at that point, part of the southern supercontinent Gondwana, started a north-toward east float brought about via ocean bottom spreading to its south-west, and later, south and south-east. Simultaneously, the immense Tethyan maritime outside layer, to its upper east, started to subduct under the Eurasian Plate. These double cycles, driven by convection in the Earth's mantle, both made the Indian Ocean and caused the Indian mainland covering in the long run to under-push Eurasia and to inspire the Himalayas. Immediately south of the rising Himalayas, plate development made a tremendous box that quickly loaded up with stream borne sediment and presently establishes the Indo-Gangetic Plain Cut off from the plain by the old Aravalli Range lies the Thar Desert.
India is the seventh-largest country in the world by area and it covers 3287263 km2 and 2.4% of the whole land part of our earth. India's shoreline estimates 7,517 kilometers (4,700 mi) long; of this distance, 5,423 kilometers (3,400 mi) have a place with peninsular India and 2,094 kilometers (1,300 mi) to the Andaman, Nicobar, and Lakshadweep island chains. According to the Indian maritime hydrographic diagrams, the central area shore comprises the accompanying: 43% sandy sea shores; 11% rough shores, including bluffs; and 46% mudflats or muddy shores.
So, option ‘B’ i.e, Both A and R are true and R is not the correct explanation of A. is correct.
Note: India represents the heft of the Indian subcontinent, lying on the Indian structural plate, a piece of the Indo-Australian Plate. Surrounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it imparts land lines to Pakistan toward the west; China, Nepal, and Bhutan toward the north; and Bangladesh and Myanmar toward the east. In the Indian Ocean, India is near Sri Lanka and the Maldives; its Andaman and Nicobar Islands share a sea line with Thailand, Myanmar and Indonesia.