Explanation:

Correct option 2: 8 and 3

186 ÷ 17 + 104 - 12 × 3 = 16

To balance the equation:

186 ÷ 17 + 104 - 12 × 3 = 16

We need to find two digits that, when interchanged, make the equation valid.

Step-by-Step Analysis:

Original Calculation:

186 ÷ 17 = 10.94

12 × 3 = 36

10.94 + 104 - 36 = 78.94

This does not equal 16.

Interchanging Digits 8 and 3:

Swap digit 8 with 3 in the equation.

The modified equation becomes: 136 ÷ 17 + 104 - 12 × 8

Calculations:

136 ÷ 17 = 8

12 × 8 = 96

8 + 104 - 96 = 16

This satisfies the equation.

Answer: Interchanging digits 8 and 3 balances the equation.