Choose the option that shall come in place of the ? in the following series:

25WV52, 23TS32, 21QP12, ?, 17KJ71

19NM91

The correct answer is Option (3) → 19NM91

1. The First Number

The first numbers in each term are decreasing by 2:

• 25 - 2 = 23
• 23 - 2 = 21
• 21 - 2 = 19
• 19 - 2 = 17

2. The Letter Pair

The letters in each pair are decreasing by 3 positions in the alphabet:

• First Letter: W (23) → T (20) → Q (17) → N (14) → K (11)
• Second Letter: V (22) → S (19) → P (16) → M (13) → J (10)

3. The Last Number

The numbers at the end of each term are simply the reverse of the numbers at the beginning:

• 25 reversed is 52
• 23 reversed is 32
• 21 reversed is 12
• 19 reversed is 91
• 17 reversed is 71

Conclusion

Combining these patterns (19, NM, 91), the missing term is 19NM91.