हिंदू मिशनरी सोसायटीची स्थापना कोणी केली ?

The correct answer is Option B (Gajananrao Vaidya).

Key Points:
• Hindu Missionary Movement: In response to aggressive Christian proselytization in Bombay and Maharashtra during the early 20th century, Hindu reformist organizations emerged.
• Establishment: Gajananrao Ketkar and Gajananrao Vaidya founded the 'Hindu Missionary Society' in Bombay in 1917.
• Mission & Shuddhi: The Society aimed to preach liberal and rational monotheistic principles of Hinduism, facilitate conversion/re-conversion (*Shuddhi*) of willing individuals back into the Hindu fold, and eliminate rigid caste orthodoxies.
• Propagation: Gajananrao Vaidya actively delivered lectures, wrote tracts, and officiated non-orthodox Hindu conversion ceremonies to counter missionary conversions.
• Key Leader: Gajananrao Vaidya was the primary driving force and founder of the Hindu Missionary Society.
• Key Takeaway: The Hindu Missionary Society was founded by Gajananrao Vaidya in Bombay in 1917.