Explanation:

- Option 1: A Muslim man can marry a Muslim woman.

- This is permitted and encouraged within Islam.

- Option 2: A Muslim man can marry a Jewish woman.

- A Muslim man is allowed to marry a Jewish woman. Islam recognizes Jews as "People of the Book."

- Option 3: Both (a) and (b).

- A Muslim man is permitted to marry both a Muslim and a Jewish woman.

- Correct Answer.

- Option 4: An idolater or a fire-worshipper.

- This is generally not permitted in Islamic teachings. Islam does not recognize idolaters or fire-worshippers as "People of the Book."

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