Explanation:

• The Bay of Bengal, the largest bay in the world, is a sea that is part of the northeastern Indian Ocean.
• The Baltic Sea is a mediterranean sea of the Atlantic Ocean, enclosed by Denmark, Estonia, Finland, Latvia, Lithuania, Sweden, northeast Germany, Poland, Russia and the North and Central European Plain.
• The Gulf of Alaska (French: Golfe d'Alaska, Russian: ????´? ???´???) is an arm of the Pacific Ocean defined by the curve of the southern coast of Alaska.
• Beaufort Sea, outlying sea of the Arctic Ocean situated north of Canada and Alaska.

Hence option 2nd is correct.