Explanation:

Let’s break it down:

- Look at the original sets: (2, 3, 25) and (3, 4, 49).

- If you take the first two numbers, square and multiply them: (2×3)² = 6² = 36 (not matching), but hold on.

- What about (First number × Second number) + (Second number)²?

- (2×3) + (3)² = 6 + 9 = 15 (not matching).

- Maybe try (First number) × (Second number)²:

- (2) × (3)² = 2 × 9 = 18 (not matching).

- Now, look at (First number + Second number)²:

- (2 + 3)² = (5)² = 25

- (3 + 4)² = (7)² = 49

- So the pattern is: (first number + second number) squared = third number.

Now, check the options:

1. (4, 5, 81): (4 + 5)² = 9² = 81  (Makes sense, fits the pattern)

2. (4, 5, 91): (4 + 5)² = 81, not 91

3. (4, 6, 110): (4 + 6)² = 100

4. (4, 7, 111): (4 + 7)² = 121

Correct Answer: Option 1 (4, 5, 81) 

See? The logic is always squaring the sum of the first two numbers. Only option 1 fits. Hope this clears it up!