Option 1, Bangladesh, is incorrect as there are no recent reports of India gifting a coastal radar system to Bangladesh.

Option 2, Maldives, is the correct answer. India, to enhance maritime security in the Indian Ocean region, installed a coastal radar system in the Maldives. It’s a part of India`s initiative to create a network of information to tackle threats in the Indian Ocean.

Option 3, Sri Lanka, is incorrect. Although Sri Lanka is a neighboring country with important maritime routes, India did not provide it with a coastal radar system recently.

Option 4, United Arab Emirates, is also not correct. The United Arab Emirates, being a gulf country, is not directly connected with India via the ocean, hence, the provision of a coastal radar system from India to this country is irrelevant in this context.