Looking at the series: B12D, G32I, L52N, ?, V92X
Let me analyze each component separately.
The first letters are: B, G, L, ?, V
Position in alphabet:
- B is the 2nd letter
- G is the 7th letter
- L is the 12th letter
- V is the 22nd letter
The pattern shows: 2, 7, 12, ?, 22
The difference is +5 each time.
2+5=7
7+5=12
12+5=17
17+5=22
The missing first letter is the 17th letter = Q
The last letters are: D, I, N, ?, X
Position in alphabet:
- D is the 4th letter
- I is the 9th letter
- N is the 14th letter
- X is the 24th letter
The pattern shows: 4, 9, 14, ?, 24
The difference is +5 each time.
4+5=9
9+5=14
14+5=19
19+5=24
The missing last letter is the 19th letter = S
The numbers are: 12, 32, 52, ?, 92
The pattern shows:
32−12=20
52−32=20
The difference is +20 each time.
52+20=72
72+20=92 ✓
The missing number is 72
Therefore, the missing term is Q72S.
The answer is Option 1: Q72S