[(9/2 ÷ 1/2 × 9/2)]/[(9/2 × 1/2 ÷ 9/2)] = ?	Choose the correct answer
A) 71	B) 61	C) 51	D) 81	E) 41
Explanation:   [(9/2 ÷ 1/2 × 9/2)]/[(9/2 × 1/2 ÷ 9/2)]   = [9/2 × 2/1 × 9/2]/[9/2 × 1/2 × 2/9]   = 81/2 / 1/2 = 81/2 x 2/1 = 81   Answer: Option 81
<result>D</result>
[(9/2 ÷ 1/2 × 9/2)]/[(9/2 × 1/2 ÷ 9/2)] = ?