A and B are brothers. C and D are sisters. A's son is D's brother. How is B…

To determine how B is related to C, let's map out the family connections step-by-step.

Step-by-Step Analysis
A and B are brothers: This means they share the same parents.

A's son is D's brother: If A has a son, and that son is the brother of D, then D must also be A's child.

C and D are sisters: Since C and D are sisters, and we established D is A's child, C is also A's child.

Relationship between B and C:

A is the father of C and D.

B is the brother of A.

The brother of a person's father is their uncle.