Which two numbers should be interchanged to make the given equation correct? 63 ÷ 21 - 42 + 8 × 7 = 135A21 and 42B21 and 8C7 and 63D7 and 21Answer: D. 7 and 21Read Explanation:Option D 63 ÷ 7 - 42 + 8 × 21 = 135 9 - 42 + 8 × 21 = 135 9 - 42 + 168 = 135 9 + 126 = 135 135 = 135. Open explanation in App