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.

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.

Godwad covers the southern part of Jalore, Sirohi and Pali districts of Rajasthan. The Sukri River and its tributaries flow through this region and join the west flowing Luni River before it flows into the Rann of Kutch. West Banas River drains the south-eastern part of the region.