Question

Study the classification table below. How have the objects been classified?

X	Y
ruler	sun
book	firefly
watch	star
diamond	fire

• A.

  X	Y
  Objects that reflect light	Objects that give out their own light

• B.

  X	Y
  Opaque objects	Transparent objects

• C.

  X	Y
  Objects that have shadows	Objects that do not have shadows

• D.

  X	Y
  Objects that produce light	Objects that produce heat and light

Answer 1

The correct option is A

X	Y
Objects that reflect light	Objects that give out their own light

The correct option is: A

Explanation of the correct option:

1. Option A: The objects like a ruler, diamond, book and watch reflect the light falling on them, while the objects like the sun, stars, fireflies and fire emit their own light.

Explanation of the incorrect option:

1. Option B: The objects given in table X are opaque but the objects given in table Y are not transparent. So, this option cannot be correct.
2. Option C: The objects given in table X have shadows but the objects given in table Y also have shadows. So, this option cannot be correct.
3. Option D: The objects given in table X do not produce any light and the objects given in table Y produce both heat and light. So, this option cannot be correct.