Let's analyze the pattern in the series ELFT, GLHT, ILJT, ______, MLNT:
1. First letters: E, G, I, ?, M → Increasing by 2 (E+2=G, G+2=I, I+2=K, K+2=M)
2. Second letters: L, L, L, ?, L → Constant 'L'
3. Third letters: F, H, J, ?, N → Increasing by 2 (F+2=H, H+2=J, J+2=L, L+2=N)
4. Fourth letters: T, T, T, ?, T → Constant 'T'
Thus, the missing term should be **KLLT**. Therefore, the correct answer is (4) KLLT.