Find the wrong term in the given series.KBCL,NEFO,QHIS,TBCU,WEFXAKBCLBQHISCTBCUDWEFX

The series seems to be a pattern of alphabets. Let's break it down:

1. KBCL
2. NEFO
3. QHIS
4. TBCU
5. WEFX

If we look at the first letter of each term, it seems to be increasing by 4 each time (K to N is +4, N to Q is +3, Q to T is +3, T to W is +3). So the pattern in the first letter is correct.

If we look at the second letter, it seems to be increasing by 4 each time (B to E is +3, E to H is +3, H to B is -4, B to E is +4). So the pattern in the second letter is incorrect at the 4th term (TBCU).

If we look at the third letter, it seems to be increasing by 2 each time (C to F is +3, F to I is +3, I to C is -6, C to F is +3). So the pattern in the third letter is incorrect at the 4th term (TBCU).

If we look at the fourth letter, it seems to be increasing by 2 each time (L to O is +3, O to S is +4, S to U is +2, U to X is +3). So the pattern in the fourth letter is incorrect at the 3rd and 4th terms (QHIS and TBCU).

So, the wrong term in the given series is TBCU.