Step 1: Source recall.
Raja Ram Mohan Roy ne ‘Sambad Kaumudi’ (also spelled Samvad Kaumudi) Bengali/Bangla bhasha mein shuru ki — ek reformist newspaper promoting social-religious reforms.
Step 2: Eliminate others.
(B) Hindi — nahin; (C) Marathi — nahi; (D) English — unka English paper ‘Mirat-ul-Akbar’ tha.
Step 3: Conclusion.
Isliye ‘Sambad Kaumudi’ ki bhasha Bangla thi.