Blood relations – "father’s only daughter" uniqueness: Introducing Sarita, Meena said, "She is the only daughter of my father's only daughter." How is Meena related to Sarita?

Introduction / Context:
The focal phrase is "my father's only daughter." If Meena's father has only one daughter, that daughter must be Meena herself. Then Sarita is the only daughter of Meena.

Given Data / Assumptions:

• Meena is female (by name convention).
• "My father's only daughter" ⇒ Meena herself.
• "She is the only daughter of (Meena)" ⇒ the referenced girl (Sarita) is Meena's daughter.

Concept / Approach:
Replace the nested clause with the speaker: Sarita is the only daughter of Meena. Therefore Meena is Sarita's mother.

Step-by-Step Solution:

Verification / Alternative check:
No other daughter can exist for Meena's father by "only," so Meena is uniquely identified; Sarita as Meena's daughter is then certain.

Why Other Options Are Wrong:
Aunt/cousin/niece require a different branch or generation; "Data inadequate" is incorrect because uniqueness is explicit.

Common Pitfalls:
Confusing "(my) father's only daughter" with "my father's daughter" plural or with a sister.

Final Answer:
Mother