Correct Option: A

The given expression
120 + 3 of 5 ÷ [7 × 2 {10 ÷ 5(24 − 10 × 2 + 7 + 3 × 10 ÷ 5)}]
= 120 + 3 of 5 ÷ [7 × 2 {10 ÷ 5(24 − 10 × 2 + 7 + 3 × 2)}]
= 120 + 3 of 5 ÷ [7 × 2 {10 ÷ 5(24 − 10 × 2 + 7 + 6)}]
= 120 + 3 of 5 ÷ [7 × 2 {10 ÷ 5(24 − 10 × 2 + 13)}]
= 120 + 3 of 5 ÷ [7 × 2 {10 ÷ 5(24 − 20 + 13)}]
= 120 + 3 of 5 ÷ [7 × 2 {10 ÷ 5 × 17}]
= 120 + 3 of 5 ÷ [7 × 2 {10 × (1/5) × 17}]
= 120 + 3 of 5 ÷ [7 × 2 {2 × 17}]
= 120 + 3 of 5 ÷ [7 × 2 × 34]
= 120 + 3 × 5 ÷ 476 = 120 +15 ÷ 476