Explanation:

The Muslim law of the Sunni sect as to marriage between a and a non-Muslim has been summarised in Mulla's Principles of Mahomedan Law, thus:
1. A Mahomedan male may contract a valid marriage not only with a Mahomedan woman, but also with a Kitabia, that is, Jewess or a Christian, but not with an idolatress or a fire-worshipper. A marriage, however, with an idolatress or a fireworshipper, is not void, but merely irregular.

2. A Mahomedan woman cannot contract a valid marriage except with a Mahomedan. She cannot contract a valid marriage even with a Kitabia, that is, a Christian or a Jew. A marriage, however, with a non-Muslim, whether he is Kitabi, that is a Christian or a Jew, or a non-Kitabi, that is an idolator or a fire-worshipper, is irregular, not void