Which letter will replace the question mark (?) in the following letter series? E, J, N, Q, S, ?

T V  U  S

T

Explanation: E, J, N, Q, S, ? The logic followed here is : E → (+5) → J → (+4) → N → (+3) → Q → (+2) → S → (+1) → T   So, the letter-cluster that replaces the (?) to complete the series is "T"