The correct option is
A Alphabet C, F, I, L equivalent to: 3, 6, 9, 12
Let us write the number equivalent to the alphabets.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1492418/original_CFIL.PNG)
Here, the numbers equivalent to the letters C, F, I, L are 3, 6, 9, 12.
Hence, the number pattern followed by the given pattern is 3, 6, 9, 12.