(A) Canada
(B) India
(C) UK
(D) Russia
🧠 Explanation:
- Canada has the longest coastline in the world, stretching over approximately 243,000 kilometers.
- It borders three major oceans: the Atlantic, Pacific, and Arctic, giving it an extensive and diverse coastal boundary.
- This vast coastline includes thousands of bays, inlets, islands, and peninsulas, especially in the northern and eastern regions.
- While countries like Russia and India have long coastlines, they are significantly shorter than Canada’s, making Canada the correct answer.