Correct Answer - Option 1 : LMN
3
Here the prime numbers are written in sequence like 2, 3, 7, 11 and so on.
In each term, the numbers are written one by one in alternate positions.
In first term it is L2MN. So, the next number must be three and it should be written after the letter which is second next(N) to L.
Hence, LMN3 is the correct answer.