Correct option is A
Given: H25U, I30T, J35S, K40R, L45P

Logic: 1st letter + 1, Number is + 5 and 3rd letter - 1 place.
H + 1 = I, I + 1 = J, J + 1 = K, K + 1 = L
25 + 5 = 30, 30 + 5 = 35, 35 + 5 = 40, 40 + 5 = 45
U - 1 = T, T - 1 = S, S - 1 = R, R - 1 = Q P
So,L45P is wrong term in the series.
Thus, correct option is (a).