UPSC Civil Service Exam Questions - Engineering

Q1:

The modules of elasticity (E) of concrete is given by

A E = 1000 fck

B E = 5700 fck

C
E = 5700 fck

D
E = 10, 000 fck

ANS:C -

E = 5700 fck

I think it should be 57000 in option C. Anyone please explain it.