Explanation:

- Assume Anamika's present age is A.

- Malini's present age is M.

- Seven years from now, Anamika will be A + 7 years old.

- Four years ago, Malini was M - 4 years old.

- According to the problem, A + 7 = M - 4.

- Srinidhi was born 2 years ago, so Srinidhi's current age is 2.

- Ten years from now, their ages will be A + 10, M + 10, and 12 (for Srinidhi).

- The average age of Anamika, Malini, and Srinidhi ten years from now is 33.

- Average: $(A+10+M+10+12)/3=33$.

- This simplifies to A + M + 32 = 99.

- Further simplification gives A + M = 67.

- Solve the equations: A + 7 = M - 4 and A + M = 67.

- Substituting M = A + 11 into the equation A + M = 67 gives:

- A + (A + 11) = 67

- 2A + 11 = 67

- $2A=56$ so $A=28$.

Option 4: 28 years is the correct answer.

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