The correct option is A 3, 6, 9, 12
The first option gives the sequence 3, 6, 9, 12.
Here, each term is formed by adding 3 to the previous term and the next term can be predicted.
Hence, the sequence 3, 6, 9, 12 is a pattern.
The next option is 1, 4, 5, 7.
It does not follow a pattern and the next term cannot be predicted.
The next option is 3, 5, 6, 8.
There is no common differnce between the terms and the next term cannot be predicted.
Hence, this is not a pattern.
The next option is 1, 4, 7, 8.
There is no common differnce between the terms and the next term cannot be predicted.
Hence, this is not a pattern.