Which film by Dr. Bhabendranath Saikia is based on a short story, namely Banaprastha ? 

Correct option is B

• The correct answer is (B) Sandhya Raag.
• Dr. Bhabendranath Saikia's film Sandhya Raag is based on his short story Banaprastha.
• It explores themes of societal change and human emotions with depth and realism.