The crystal structure of gamma iron is_________________?

A. cast iron
B. forged steel
C. mild steel
D. high carbon steel
E. H.S.S

A. 3- 5
B. 5-7
C. 7-10
D. 10-15
E. 15-22

A. body centred cubic
B. face centred cubic
C. hexagonal close packed
D. cubic structure
E. orthorhombic crystal

A. 0.2%
B. 0.8%
C. 1.3%
D. 2%
E. 6.3%.