Which ploneer sclentist used radlo waves to transmit signals over distances of several kilometres in the 1890s?

Correct option is C

The correct answer is (c) Guglielmo Marconi.
• Guglielmo Marconi was the pioneer scientist who used radio waves to transmit signals over distances of several kilometers in the 1890s.
• He is widely credited with the invention of the radio and was awarded the Nobel Prize in Physics in 1909 for his contributions to wireless telegraphy.
Facts to remember:
• Marconi successfully sent and received the first transatlantic radio signal in 1901.
• His work laid the foundation for the development of modern wireless communication technologies.