A is the daughter of B. C is B’s sister. How is C related to A?

Appeared in: SCTIMST Staff Nurse - 2015 (Set-A)

Explanation

The first statement, 'A is the daughter of B,' establishes that B is the parent of A.
The second statement, 'C is B’s sister,' establishes a sibling relationship between C and B.
Combining these facts, C is the sister of A's parent.
By definition, the sister of a person's parent is their aunt.

Option B: C is the sister of B, not the sister of A. They belong to different generations.
Option C: A cousin is the child of one's aunt or uncle. A is the child of B, not C.
Option D: B is the parent (mother or father) of A. C is B's sister.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning - Blood Relations as background academic context rather than a clinical decision trigger.
This question tests logical deduction, a critical skill for nurses in problem-solving and decision-making.
Understanding family relationships is essential in nursing for taking accurate family histories, which is crucial for assessing genetic risks for conditions like hereditary cancers or cardiovascular diseases.
What if the question stated 'C is B's brother'? In that case, C would be A's uncle.

How to Approach the Question

First, break down the first statement: 'A is the daughter of B.' This establishes a direct parent-child relationship.
Next, analyze the second statement: 'C is B’s sister.' This establishes a sibling relationship between C and B.
Visually map or draw these relationships. Place B above A, and place C next to B on the same level.
Combine the two relationships to find the connection between C and A: C is the sister of A's parent.
Finally, identify the standard term for this relationship ('Aunt') and select the matching option.

Concept Tested & Keywords

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Practise the full SCTIMST Staff Nurse - 2015 (Set-A)

Attempt every question from this paper in a timed mock, then review the full solution for each one.