Correct Answer - Option 2 : × and +
Check with options one by one:
Given expression: 3 × 5 + 3 - 18 ÷ 3 = 12
1) ÷ and +
3 × 5 ÷ 3 - 18 + 3
= 5 - 18 + 3
= - 10 ≠ 12
2) × and +
3 + 5 × 3 - 18 ÷ 3
= 3 + 15 - 6
= 12
3) × and -
3 - 5 + 3 × 18 ÷ 3
= 3 - 5 + 3 × 6
= 3 - 5 + 18
= 16 ≠ 12
4) × and ÷
3 ÷ 5 + 3 - 18 × 3
= 0.6 + 3 - 54
= - 50.4 ≠ 12
Hence, option (2) is the correct answer.