Discussion
Which of the following statements is/are correct about planets ?
(A) They are lit by the light of the stars.
(B) They are made up of only rocks.
(C) All planets have their moons.
Answer: B
Only statement A is correct, so the answer is Only (A).
Planets have no light of their own. They shine because they reflect the light of a star, which in our solar system is the Sun, so statement A is true.
Statement B is false: Mercury, Venus, Earth and Mars are rocky, but Jupiter, Saturn, Uranus and Neptune are giant planets made largely of gases. Statement C is also false, because Mercury and Venus have no moons at all. Every option other than 'Only (A)' includes B or C, so each of them is wrong.
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