Assertion (A) : Exosphere Extends beyond the Thermosphere hundreds of kilometers, gradually fading into interstellar space.
Reason (R) : Molecules often escape into space after colliding with one another.

Options

A. If (A) and (R) are correct and (R) is the correct explanation of (A)
B. If (A) and (R) are correct but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If (A) is false but (R) is true

Answer

B