Correct Answer: (7, 13, 3)

Solution : Given:
(14, 20, 3)

Subtract the first number from the second number and then divide the resultant by 2, to get the third number.
⇒ (14, 20, 3)→(20 – 14) ÷ 2 = 6 ÷ 2 = 3

Let's check the options –
First option: (7, 13, 3); (13 – 7) ÷ 2 = 6 ÷ 2 = 3
Second option: (5, 10, 15); (10 – 5) ÷ 2 = 5 ÷ 2 = 2.5 ≠ 15
Third option: (3, 6, 9); (6 – 3) ÷ 2 = 3 ÷ 2 = 1.5 ≠ 9
Fourth option: (4, 8, 16); (8 – 4) ÷ 2 = 4 ÷ 2 = 2 ≠ 16

So, only the first option follows the pattern. Hence, the first option is correct.