|A) Both A and R are true and R is the correct explanation of A.||B) Both A and R are true but R is NOT the correct explanation of A.|
|C) A is true but R is false.||D) A is false but R is true.|
Answer: C) A is true but R is false.
Pluto, being farthest from the sun, hardly gets the sun's rays. So, Pluto is the coldest planet.