CSteel, brass and rubber respectively
c
(c) $Y = \tan \theta $. According to figure ${\theta _A} > {\theta _B} > {\theta _C}$
i.e. $\tan {\theta _A} > \tan {\theta _B} > \tan {\theta _C}$
or ${Y_A} > {Y_B} > {Y_C}$
$ A, B,$ and $C$ graph are for steel, brass and rubber respectively.