A is D's brother. D is B's father. B and C are sisters. How is C related to A?

Difficulty: Easy

Correct Answer: Niece

Explanation:


Introduction / Context:

Here you are given a short chain of relationships involving siblings and parent-child links, and you must identify how one person is related to another. This is a classic, simple blood-relation question designed to test whether you can track basic family connections like brothers, fathers, and nieces without getting confused.


Given Data / Assumptions:

  • A is D's brother.
  • D is B's father.
  • B and C are sisters.
  • We must determine how C is related to A.
  • We assume standard family structure where siblings share parents and "sister" means a female sibling.


Concept / Approach:

The idea is to build a small family tree. First we place A and D as siblings. Then we add B as a child of D. Because B and C are sisters, C is also a child of D. Once we see that C is D's daughter and A is D's brother, C is clearly A's niece. The question asks for the relation of C to A, so "niece" is the correct term.


Step-by-Step Solution:

Step 1: From "A is D's brother", we know that A and D are siblings in the same generation, and both are likely male (A is male, D may be male but at least is a parent). Step 2: From "D is B's father", we see that B is a child of D and that D is definitely male. Step 3: B and C are sisters. This means both B and C are daughters, and they share the same parents, one of whom we already know is D. Step 4: Therefore, C is also a child of D. So D has at least two daughters: B and C. Step 5: Because A is the brother of D, A is B's and C's paternal uncle. Step 6: The question, however, asks how C is related to A. From A's perspective, C is the daughter of his brother, which makes her his niece.


Verification / Alternative check:

We can rewrite the relationships explicitly: D is father of B and C; A is D's brother. In everyday speech, the children of your brother are your nieces or nephews. Since C is specifically a sister (female), she must be a niece. There is no other standard term for a brother's daughter, so this relationship is unique and fully determined.


Why Other Options Are Wrong:

C is not A's cousin, because cousins are children of one's aunt or uncle, not children of one's sibling; C is one generation below A, not in the same generation.

C cannot be A's aunt, because an aunt would be in an older generation than A, not a younger one.

"Nephew" would be used if C were male; but C is explicitly described as a sister and thus female, so "niece" is the correct gendered term.


Common Pitfalls:

Some students rush and mix up which direction the relationship is being asked from. The question is not "Who is A to C?" but "How is C related to A?". Always read the question carefully and answer from the correct person's point of view. Drawing a simple tree with D in the middle, A as D's brother, and B and C as D's daughters can make the relationships immediately clear.


Final Answer:

C is A's niece.

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