During work, Raman and Narayan were chatting:
Raman said, ‘Narain, I’ve been attending night classes for 5 months now and I have an exam next week.
Narayan, ‘Oh!’
Raman, ‘For example, do you know who is Graham Bell?’
Narayan, ‘No.’
Raman, ‘He’s the inventor of the phone in 1876. If you take...