Concept:The series comprises two alternating sequences: one at odd positions and another at even positions.
Explanation:Separate the series into two patterns.
Odd positions: 2, 4, 6, 8, 10 (each increases by 2).
Even positions: 3, 6, 9, 12 (each increases by 3).
The next term is the 10th term, which belongs to the even-position sequence.
Add 3 to the last even term: 12 + 3 = 15.
Answer:D. 15
