A: Sons of the same parent are called brothers.
B: Sons of the same parents are called brothers.

Which one is correct?

closed as off-topic by user3169, James, David Richerby, Stephie, Andrew Aug 3 '18 at 14:32

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  • Why do you think that only one of them can be correct? – David Richerby Jul 31 '18 at 14:39

Both of your alternatives are correct. Boys who share one or two parents are brothers. If they share the same parents (plural) they are often simply called 'brothers'. If they share one parent (singular) they are often called 'half brothers'.

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