Explanation:

- The pattern involves shifting both the letter and the number by a fixed amount.

- For "C 1" to "F 4":

- The letter 'C' moves forward by 3 places in the alphabet to become 'F'.

- The number 1 increases by 3 to become 4.

- For "J 6" to "M 9":

- The letter 'J' moves forward by 3 places to become 'M'.

- The number 6 increases by 3 to become 9.

- Applying the same logic to "P 4":

- The letter 'P' moves forward by 3 places to become 'S'.

- The number 4 increases by 3 to become 7.

- Correct Answer: Option 3, S 7