Explanation:

Let’s break down the information, member by member:

- P is the father-in-law of U — so U is married to P’s child.

- U is the mother of F and the only child of X. U is female.

- J is the husband of X — making X female.

- F is the son of W — W must be F’s mother (since F is U’s child, and U is female, but keep going).

- M is the brother of F — M is male, sibling of F.

- R is the mother of W — so R is female.

Now, let’s assign genders where we can:

- U: Female (said directly, mother)

- X: Female (J is her husband)

- J: Male (said directly, husband)

- P: Male (father-in-law of U and not married to U, so must be married to X)

- F: Son (so male)

- W: If F is the son of W, and U is the mother of F, then W must be U (since U is the only child of X, and F is only described as U’s child). So W = U.

- M: Male (brother of F)

- R: Female (mother of W/U)

Let’s count females with all this mapped out:

- U/W (same person): Female

- X: Female

- R: Female

That’s three females. Here’s the thing though: even with all the connections, there’s no evidence for a fourth female unless there’s a hidden member or a double identity that isn't supported by the statements. So…

- Option 1: Two — Not enough

- Option 2: Three — This lines up with our breakdown

- Option 3: Four — That doesn't check out with the info

- Option 4: Five — No way

- Option 5: Either four or five — Not supported