[A]. 25
[B]. 30
[C]. 37
[D]. 40
✅ The correct answer is option D.
The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.
So, 40 is wrong.
The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.
So, 40 is wrong.