Consider the following statements: (a) A Muslim's marriage contracted with his sister is void (b) A…

Under Muslim law, a marriage contracted within the prohibited degrees of consanguinity (blood relationship) is void ("batil"). Prohibited degrees of consanguinity include one's ascendants (such as a mother or grandmother), descendants (such as a daughter or granddaughter), and siblings (such as a sister), making the marriages in (a), (c), and (d) void. A marriage with a paternal aunt's daughter (first cousin), as in (b), is not within the prohibited degrees of consanguinity and is valid. Statements (a), (c), and (d) are therefore correct.