The sum of the present ages of Vijayshree and Unnati is 52 years. After 2 years Unnati's age will be 2 years more than Subhi's age then. If Vijayshree is younger than Subhi by 6 years, find the age of Unnati 6 years ago.

Let Unnati's current age = U, Vijayshree's current age = V, Subhi's current age = S. Given: V + U = 52, V = S - 6 (Vijayshree is 6 years younger than Subhi). After 2 years: U + 2 = (S + 2) + 2 = S + 4. So U = S + 2. From V = S - 6 and V + U = 52: (S - 6) + (S + 2) = 52, so 2S - 4 = 52, 2S = 56, S = 28. Then U = S + 2 = 30. Unnati's age 6 years ago = 30 - 6 = 24. Option C (24 years) is correct.