Find the next term of the letter series.
AaC, BbD, DdF, HhJ, ________​

Correct option is C

Given Terms:

AaC, BbD, DdF, HhJ, ________

Each term is a 3-letter group: Capital letter, small letter, capital letter.

Let’s split and study each part:

Pattern Analysis:

1st letter (capital): A, B, D, H →
Positions: 1, 2, 4, 8 → Powers of 2
So next: 16 → P

2nd letter (small): a, b, d, h →
Positions: 1, 2, 4, 8 → Powers of 2 again
So next: 16 → p

3rd letter (capital): C, D, F, J →
Positions: 3, 4, 6, 10 → Looks like:
3 (+1), 4 (+2), 6 (+4), 10 (+6)
So next increase: +8 => 10 + 8 = 18 =>R

Final Answer:​

Option C: PpR