Explanation

"Bahamas" is incorrect because the Bahamas is not the location of Astola. "Atlantic Ocean" is incorrect because the Atlantic Ocean is a body of water, not the specific location for this island. "Maldives" is incorrect because the Maldives is a different archipelago nation. "None of these" is correct because Astola is located in the Arabian Sea, making 'None of these' the accurate choice among the given options.