Choose the missing terms out of the given alternatives : WFB , TGD , QHG , ?

The correct answer is $\boxed{\text{NIJ}}$.

The pattern is to take the previous letter, move it one position forward in the alphabet, and then add the next letter in the alphabet. So, the next letter in the pattern is $\boxed{\text{NIJ}}$.

Here is a breakdown of each option:

• $\boxed{\text{NIJ}}$: This is the correct answer. The pattern is to take the previous letter, move it one position forward in the alphabet, and then add the next letter in the alphabet. So, the next letter in the pattern is $\boxed{\text{NIJ}}$.
• $\text{NIK}$: This is not the correct answer. The pattern is to take the previous letter, move it one position forward in the alphabet, and then add the next letter in the alphabet. So, the next letter in the pattern should be $\boxed{\text{NIJ}}$, not $\text{NIK}$.
• $\text{NJK}$: This is not the correct answer. The pattern is to take the previous letter, move it one position forward in the alphabet, and then add the next letter in the alphabet. So, the next letter in the pattern should be $\boxed{\text{NIJ}}$, not $\text{NJK}$.
• $\text{OIK}$: This is not the correct answer. The pattern is to take the previous letter, move it one position forward in the alphabet, and then add the next letter in the alphabet. So, the next letter in the pattern should be $\boxed{\text{NIJ}}$, not $\text{OIK}$.
• $\text{PJK}$: This is not the correct answer. The pattern is to take the previous letter, move it one position forward in the alphabet, and then add the next letter in the alphabet. So, the next letter in the pattern should be $\boxed{\text{NIJ}}$, not $\text{PJK}$.