छायाचित्रातील मुलीकडे निर्देश करत गणू म्हणाला, "हिच्या आईचा भाऊ माझ्या आईच्या वडिलांचा एकुलता मुलगा आहे. माझी आई तिच्या वडिलांची एकटी मुलगी आहे." मुलीच्या आईचे गणूशी नाते दर्शवणारा पर्याय निवडा.

The correct answer is Option C (आई).

Key Points:
• The key concept is solving Blood Relation puzzles logically.
• Break down Ganu's statement:
• 1. "माझ्या आईच्या वडिलांचा एकुलता मुलगा" (My mother's father's only son) -> Ganu's maternal uncle (Mama).
• 2. Ganu says: "हिच्या आईचा भाऊ = माझा मामा" (The girl's mother's brother is Ganu's Mama).
• 3. This means the girl's mother is the sister of Ganu's Mama.
• 4. Ganu also adds: "माझी आई तिच्या वडिलांची एकटी मुलगी आहे" (My mother is the ONLY daughter of her father).
• 5. Since Ganu's mother is the only daughter, and the girl's mother is also the daughter of the same grandfather (being the sister of the Mama), the girl's mother MUST be Ganu's mother herself.
• Therefore, the girl's mother is Ganu's mother (आई).
• Key Takeaway: Trace relations step-by-step backward. 'Only daughter' constraint ensures the person is referring to their own mother.