Discussion
Assertion (A) : Pluto is the coldest planet.
Reason (R) : It receives slanting rays of the sun.
Answer: C
Correct answer: A is true but R is false.
Pluto is indeed the coldest of the bodies traditionally counted as planets, at around \( -230^{\circ}\mathrm{C} \), so A is true. But the cause is its enormous distance from the sun - sunlight there is some 1600 times fainter than at the earth - not the slant of the rays, which is what makes the earth’s poles cold. R is false.
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