Correct Answer - D
Distance of image from the plane surface is `:`
`x_(1)=(4)/(1.6)=2.5cm``(d_(app)=(d_(actucal))/(mu))` for the curved side `(1.6)/(4)+(1)/(x_(2))=(1-1.6)/(8)`
`:. x_(2)~~-3.0 cm`
The minus sign means the image is on the object side
`:. I_(1)I_(2)=(8-2.5-3.0)cm =2.5 cm`