Step 1: Fix the place and the year.
The clue is Pune, and the earliest known girls' school there dates to 1848, run by a husband and wife reformer team.
Step 2: Name the reformer pair.
Jyotiba Phule started this school with his wife Savitribai Phule, who went on to teach there, becoming a pioneer for both girls' education and lower caste education together.
Step 3: Eliminate reformers from other regions or eras.
Ram Mohan Roy is linked to Bengal, Vivekanand to religious reform, and Gandhi to the later freedom struggle, so none of them match this specific Pune school.
Final Answer:
Option (D), Jyotiba Phule, is correct.