Variation of silicon wafer thickness arises between which range of following mentioned values

Variation of silicon wafer thickness arises between which range of following mentioned values in the aspect of thin film technology?

a) 50 A to 50000 A
b) 500 A to 50000A
c) 0.5 A to 500A
d) Both a & b depending on the requirement of epitaxial chip thickness.

Correct Answer : a) 50 A to 50000 A

Explanation :

Thickness value is standard fixed assigned for thin film technology which lies in the range of 50 to 500000A.