Which two numbers should be interchanged to make the given equation correct?
15 × 5 − 75 + (300 ÷ 6) + 3 × 19 = 115
(NOTE: Numbers must be interchanged and not the constituent digits e.g. if 2 and 3 are to be interchanged in the equation 43 × 3 + 4 ÷ 2, then interchanged equation is 43 × 2 + 4 ÷ 3)
1
6 and 3
2
6 and 5
3
15 and 19
4
15 and 6