A is the (only) daughter of B, B is the (only) son of C: how is A related to C

The same question, asked 2 times: 19 Sep 2025 S1*, 22 Sep 2025 S3. Every wording below, oldest first.

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Question 1
19 Sep 2025 S1
10 $A is the only daughter of B, who is the only son of C. How is A related to C?$
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Question 2
22 Sep 2025 S3
4 $P is the daughter of Q. Q is the son of R. How is P related to R?$
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