Correct Answer: ÷ and ×

Solution : Given:
95 × 5 + 19 ÷ 2 − 21 = 36

Replace the given symbols in the options one by one with the original symbols in the given equation.
First option: ÷ and ×
⇒ 95 ÷ 5 + 19 × 2 − 21
= 19 + 38 − 21
= 36
Second option: + and −
⇒ 95 × 5 − 19 ÷ 2 + 21
= 475 − 9.5 + 21
= 486.5 ≠ 36
Third option: ÷ and −
⇒ 95 × 5 + 19 − 2 ÷ 21
= 475 + 19 − 0.09
= 493.91 ≠ 36​​​​​​​
Fourth option: + and ×
⇒ 95 + 5 × 19 ÷ 2 − 21
= 95 + 47.5 − 21
= 121.5 ≠​​​​​​​ 36

Here, only the first option satisfies the R.H.S. of the given equation. Hence, the first option is correct.