Correct option is A
Given: 3T3, 5S5, 9R7, 12P8, 23P11
Logic:
1st number: adding (+2, +4, +6, 8,...)
Middle letters: decreasing by - 1 each time.
2nd numbers: increasing by + 2 each time.
Let's solve it:
First numbers: 3 + 2 = 5, 5 + 4 = 9, 9 + 6 =15 ≠ 12, 15 + 8 = 23
Letters: T - 1 = S, S - 1 = R, R - 1 = Q ≠ P, Q - 1 = P
Second numbers: 3 + 2 = 5, 5 + 2 = 7, 7 + 2 = 9 ≠ 8, 9 + 2 = 11
So, the term 12P8 that does NOT belong to the given series.
Thus, the correct option is (a) 12P8.
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