When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and _________

A)
1
B)
2
C)
3
D)
4

Correct Answer : Option (A) :   1


Explanation : When altitude of earth is in between 90 km and 150 km Knudsen number can be in between 0.3 and 1.