Arti cut out sheets of the same size from four different materials. She arranged them in a straight line as shown.
She then made a crescent-shaped hole in sheet
W. She then shone torchlight on set-up and saw a
bright crescent-shaped patch of light on sheet
Y only. Select the option that correctly identifies
the materials of which sheets W, X, Y and Z are
made up of.
| W | X | Y | Z | |
| A | Metal | Clear plastic | Frosted glass | Cardboard |
| B | Cardboard | Frosted glass | Clear plastic | Metal |
| C | Cardboard | Clear plastic | Metal | Frosted glass |
| D | Frosted glass | Metal | Cardboard | Clear plastic |
i did c