B is the only son of A. C is the mother of D. A is the mother of C. The relation of B with D is:

| Question | B is the only son of A. C is the mother of D. A is the mother of C. The relation of B with D is: | |
| Type | multiple_choice | |
| Option | Paternal uncle | incorrect |
| Option | Maternal uncle | correct |
| Option | Brother | incorrect |
| Option | Father | incorrect |
Solution:
From the relation it is clear that B is the maternal uncle of D.