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Question
Which organisation was responsible for excluding Pluto from the Sun's planet list?
Options:
A .  IAU
B .  IUPAC
C .  NASA
D .  USA
Answer: Option A
:
A
In 2006, the International Astronomical Union (IAU) adopted a new definition of a planet such that Pluto doesnot fit this definition. Hence,it is no longer a planet of the solar system.

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