Question

A red and a green pencil are taken in a room illuminated with green light. In the room

• A. Red pencil will appear red and green pencil dark
• B. Pencils will appear as red and green respectively
  
• C. Red pencil will appear dark and green pencil as green
• D. Both pencils will appear dark

Answer 1

The correct option is C Red pencil will appear dark and green pencil as green

As we know that the colour of an object is due to the reflection of light by same.
When a red and a green pencil are kept in green light, the green pencil reflects green colour and red pencil absorbs green colour. Therefore green pencil appears green and the red pencil appear's dark.

Hence , option $\left(C\right)$ is correct.