There was a dispute between two brothers regarding some property matter. On a particular occasion wives of these two brothers were found quarrelling with each other. The elder of the two brothers came in and requested them to refrain from quarrelling. At that time the younger brother suddenly appeared and gave a lethal blow on the head of the elder brother who died after a few hours in the hospital. Which one of the following offences has been committed by the younger brother?

Answer: Option A