When one end of a short metal bar is heated the opposite end will eventually become hot due to the process of conduction. The correct option in regards to the given question is option "A". Conduction is actually the process in which the heated and the faster molecules collide with the older molecules to transfer the heat from the hot end to the cold end. By the method of conduction, the heat gets transferred to the colder end without being directly in contact with a heating devise.
