Correct Answer - Option 3 : -0.25
Option 3 is correct, i.e. -0.25.
Magnification: Magnification produced by a spherical mirror gives the relative extent to which the image of an object is magnified with respect to the object size. It is expressed as the ratio of the height of the image to the height of the object.
\(magnification,\left( m \right) = - \frac{{distance\;of\;image\;\left( v \right)}}{{distance\;of\;object\;\left( u \right)}}\)
\(m = - \frac{{50}}{{200}}\)
m = -0.25
