What do you think happened after Bepin Babu came to know the truth? Was he angry with this friend for playing such a trick on him? Or do you think he decided to help a friend in need?
After Bepin Babu came to know the truth, he was relieved and embarrassed in equal parts. He was relieved that his memory was flawless. On the other hand, he was so embarrassed to have been hoodwinked by an old friend, that he told his doctor a lie.