Which of the following layers makes radio transmission possible?

(A) Troposphere
(B) Ionosphere
(C) Mesosphere
(D) Stratosphere

Answer: (B) Ionosphere

Q. The ionized part of Earth’s upper atmosphere from about 60 km to 1000 km altitude and it is ionized by solar radiation is known as:
(A) Ionosphere
(B) Troposphere
(C) Mesosphere
(D) Stratosphere

Answer: (A) Ionosphere

Q. The region below the Ionosphere is called:
(A) Troposphere
(B) Mesosphere
(C) Neutrosphere
(D) Stratosphere

Answer: (C) Neutrosphere