Fact 1
Some pens don't write


Fact 2
All blue pens write


Fact 3
Some writing utensils are pens


If the first three statements are facts, which of the following statements must also be a fact


I
Some writing utensils don't write


II
Some writing utensils are blue


III
Some blue writing utensils don't write

I only
 
I and II only
 
II and III only
 
None of the statements is a known fact.
 

Answer

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