Explanation:

- Given information and relationships can help solve the problem:

- M # P © % J: M is the daughter of P who is the grandmother of J.

- N + $ R: N is the brother-in-law of R.

- O + $ B ! $ S % J # R: O is the brother-in-law of B who is the father-in-law of S, and S is the mother of J, daughter of R.

- P * O ~ B: P is the sister-in-law of O and O is older than B.

- N @ $ B: N is the son-in-law of B.

- B ~ P: B is older than P.

- From "O + $ B ! $ S % J # R; P * O ~ B," it follows:

- O is older than B as per "O ~ B" rule.

- B is older than P (B ~ P) and P is 46.

- Since B is older than P, and given O > B, and O is 49, B cannot be older than O.

- Checking possible ages for B:

- If B = 48: B is younger than O and older than P.

- If B = 45 or less: Does not satisfy B > P.

- If B = 50 or more: Does not satisfy O > B.

- ?? The correct answer is Option 1: 48.