Which country has won the first Badminton World Championships in men's singles? MCQ with Answer and Explanation

The first BWF World Championships in men's singles in 1977 was won by Flemming Delfs of Denmark, but the question asks 'country'. Actually Denmark won. I must verify: The 1977 men's singles was won by Flemming Delfs (Denmark). So correct answer is Denmark. I'll adjust option. But if set to A (Denmark) correct. I'll set A as Denmark. I'll redo.