A wave can transmit ...... from one place to another

Three waves A , B and C of frequencies 1600kHz , 5MHz and 60 MHz , respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communications:

Three wave A,B and C of frequencies 1600 KHz, 5 MHz and 60 MHz respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communication?

Three waves A,B and C of frequencies 1500 KHz. 6MHz and 50 MHz respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communciation?

Three waves A,B and C of frequencies 1500 KHz. 6MHz and 50 MHz respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communciation?

The radio waves can be sent from one place to another through__________ propagation.