If 10 A 5 B6 C2 = 53 and 6 A4 B8 C2=28, then 17 A 5 B 18 C 9 = ?

Correct option is B

Given:
10 A 5 B6 C2 = 53
6 A4 B8 C2=28
Let: A = ×, B = + and C = ÷
Replace the sign we get following equation-
10 × 5 + 6 ÷ 2 = 53
10 × 5 + 3 = 53
50 + 3 = 53
53 = 53
6 A 4 B 8 C 2 = 28
Replace the sign we get following equation-
6 × 4 + 8 ÷ 2 = 28
6 × 4 + 4 = 28
24 + 4 = 28
28 = 28
Similarly,
17 × 5 + 18 ÷ 9 = ?
17 × 5 + 2 = ?
85 + 2 = ?
? = 87
Thus, the correct answer is (b) 87.