Series Analysis:

In order to find the missing term in the given series, we need to analyze the pattern or rule that governs the sequence of letters. Let's break down the given series:

WFB, TGD, QHG, ?

Pattern Analysis:

Upon analyzing the given series, we can observe the following pattern:

1. The first letter of each term is moving backward by one position in the English alphabet.
W -> T -> Q -> ?

2. The second letter of each term is moving forward by one position in the English alphabet.
F -> G -> H -> ?

3. The third letter of each term is moving backward by one position in the English alphabet.
B -> D -> G -> ?

Applying the Pattern:

Based on the pattern analysis, we can determine the missing term as follows:

1. The first letter in the missing term should be one position backward from Q, which is P.
2. The second letter in the missing term should be one position forward from H, which is I.
3. The third letter in the missing term should be one position backward from G, which is F.

Therefore, the missing term in the given series is "PIF".

Answer:
c) NIJ

NIJ