if engineering stress for a material is 250 Mpa and engineering strain is 0.2 , then true strain is

if engineering stress for a material is 250 Mpa and engineering strai

1.	if engineering stress for a material is 250 Mpa and engineering strain is 0.2 , then true strain is
A.	0.079
B.	-0.22
C.	0.18
D.	-1.61
Answer» D. -1.61