Question

A and B are married. They have a son, S. B also has a daughter, D, from a previous relationship. S and D are related to each other as follows

[1] They are blood relatives in the direct line.

[2] They are collateral blood relatives.

[3] They are relatives by affinity in the direct line.

[4] They are relatives by affinity in the collateral line

Answer 1

[4] They are relatives by affinity in the collateral line