Correct Answer: + and ×

Solution : Given:
14 + 63 ÷ 7 – 21 × 35 = 140

Replace the given symbols in the options one by one with the original symbols in the given equation.
First option: + and –
Solving the L.H.S. of the equation –
= 14 – 63 ÷ 7 + 21 × 35
= 14 – 9 + 21 × 35
= 14 – 9 + 735
= 740 ≠ 140
Second option: + and ×
Solving the L.H.S. of the equation –
= 14 × 63 ÷ 7 – 21 + 35
= 14 × 9 – 21 + 35
= 126 + 14
= 140 = R.H.S.
Third option: – and ×
Solving the L.H.S. of the equation –
= 14 + 63 ÷ 7 × 21 – 35
= 14 + 9 × 21 – 35
= 14 + 189 – 35
= 168 ≠ 140
Fourth option: ÷ and ×
Solving the L.H.S. of the equation –
= 14 + 63 × 7 – 21 ÷ 35
= 14 + 63 × 7 – 0.6
= 14 + 441 – 0.6
= 454.4 ≠ 140

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