What should come in place of (?) in the given series?
126, 1236, 12336, 123336, 1233336, (?)

Given sequence:
126, 1236, 12336, 123336, 1233336, (?)
Observing the pattern:
126 → 1236
The "6" is appended at the end.
1236 → 12336
Another "3" is inserted before "6".
12336 → 123336
Another "3" is inserted before "6".
123336 → 1233336
Another "3" is inserted before "6".
Following this pattern, in the next step, another "3" should be inserted before "6".
Thus, the next term should be: 12333336.
Correct answer is (A) 12333336

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