Explanation:

To solve the expression, let's break it down step by step:

- First Part:

(3 ÷ 4) of 20 = (3/4) * 20 = 15

- Second Part:

16 ÷ 2 = 8

- Combined First Two Parts:

15 + 8 = 23

- Third Part:

Calculate (1 ÷ 3) of 12 = (1/3) * 12 = 4

- Fourth Part:

Calculate (2 ÷ 5) of 25 = (2/5) * 25 = 10

- Bracket Calculation:

4 + 10 = 14

- Final Step:

23 - 14 = 9

The correct answer is Option 4: 9.

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