Ganesh Mavlankar is considered as the father of Lok Sabha. He was popularly called 'Dada Saheb'. He was the Speaker of the Constituent Assembly (Legislative) and the Provisional Parliament (1947-52). He served as the Speaker of the Bombay Legislative Assembly from 1937 to 1946.

The river that is often referred to as the "lifeline of European trade" is (B) Rhine. The Rhine River is a major waterway in Europe that flows through several countries, including Germany, France, the Netherlands, Switzerland, Austria, and Liechtenstein. It plays a crucial role in the transportation of goods and is an important trade route, earning it the designation as the "lifeline of European trade."

The telephone was invented by Alexander Graham Bell. The correct answer is (A) Alexander Graham Bell. Bell is widely recognized for his pioneering work in the development of the telephone, and he received the first US patent for the invention of the telephone in 1876.

in case of a disagreement between the two Houses of Parliament over a non-money bill, the President may call a joint sitting of both the Houses to consider it.

So, the correct answer is:

(C) the President may call a joint sitting of both the Houses to consider it.