Step-by-step Solution:

The alphanumeric series is: J14, L16, __, P20, R22.

The pattern for the letters: J (10), L (12), N (14), P (16), R (18). Each letter increases by 2 in alphabetical position.

The pattern for the numbers: 14, 16, 18, 20, 22. Each number increases by 2.

Thus, the missing term is N18.

Answer: (B) N18