GENERAL KNOWLEDGE

Detailed explanation-1: -Alexander Graham Bell is credited with being the inventor of the telephone since his patent and demonstrations for an apparatus designed for “transmitting vocal or other sounds telegraphically… causing electrical undulations” were successful. First Bell Telephone, June 1875.

Detailed explanation-2: -He also worked in medical research and invented techniques for teaching speech to the deaf. Bell’s extensive range of genius included patents for the telephone and telegraph, the photophone, aerial vehicles, and hydro-planes.

Detailed explanation-3: -Although Alexander Graham Bell is best remembered as the inventor of the telephone, he invented other devices too.