Boojho found a bag containing the following materials
(i) Mirror (ii) Paper stained with oil (iii) Magnet (iv) Glass spectacles
Help Boojho in finding out the material(s) which is/are opaque.
(a) (i) only
(b) (iv) only
(c) (i) and (iii)
(d) (ii) and (iv)
Mirror and Magnet
A mirror is opaque since it is painted on one side and Magnet is opaque since it is made up of iron metal.
Hence option (C) is correct.