Identify the term that does NOT belong to the following series.
H7 J14 L22 N28 P35 R42

Information Given:
Series: H7, J14, L22, N28, P35, R42

Letters:
H, J, L, N, P, R
Each letter increases by +2 

Check the letter pattern

H → J → L → N → P → R

Each step +2 letters.
✔ Letter pattern is correct.

Check the number pattern

7 → 14 → 22 → 28 → 35 → 42

Expected pattern should be +7 each time:

7 + 7 = 14 
14 + 7 = 21  (but given 22)
21 + 7 = 28
28 + 7 = 35
35 + 7 = 42

So 22 should be 21.

Therefore the incorrect term is L22.

Thus, the correct option is: (c)