Correct Answer - C
(c) We know that , `Deltal=(FL)/(AY)`
Here, `Deltal prop (L)/(A)`
According to question
`implies (Deltal_(1))/(Deltal_(2))=(L_(1))/(L_(2))xx(A_(2))/(A_(1))`
`implies (Deltal_(1))/(Deltal_(2))=(1)/(2)xx(1)/(2)implies(Deltal_(1))/(Deltal_(2))=(1)/(4)`
`Deltal_(2)=4Deltal_(1)=4xx1, Deltal_(2)=4 cm`