Correct Answer: 5 and 3

Solution : Given:
1 × 4 + 3 – 5 = 6

Replace the given numbers in the options one by one with the original numbers in the given equation.
First option: 4 and 5
⇒ 1 × 5 + 3 – 4 = 6
= 5 – 1
= 4 ≠ 6
Second option: 3 and 6
⇒ 1 × 4 + 6 – 5 = 3
= 4 + 1
= 5 ≠ 6
Third option: 5 and 3
⇒ 1 × 4 + 5 – 3 = 6
= 4 + 2
= 6 = R.H.S.
Fourth option: 1 and 5
⇒ 5 × 4 + 3 – 1 = 6
= 20 + 2
= 22 ≠ 6

So, only the third option satisfies the R.H.S. of the given equation. Hence, the third option is correct.