• Reasoning Ability - Syllogisms
Question
Statements:  No animal is a dog.
                      Some monkeys are animals.
                      All cats are dogs.

Conclusions: I. Some animals are monkeys.
                       II. No cat is an animal.
  • A) If only conclusion I follows
  • B) If only conclusion II follows
  • C) If either conclusion I or II follows
  • D) If neither conclusion I nor II follows
  • E) If both conclusion I and II follows
Solution
E
Some monkeys are animals (I) - conversion - Some animals are monkeys (I). Hence conclusion I follows. 
 
Again, All cats are dogs (A) + (No animal is a dog (E) - ) conversion - No dog is an animal = A + E = E = No cat is an animal.
 
Hence, conclusion II follows.

Hence, option C is correct.
E
Some monkeys are animals (I) - conversion - Some animals are monkeys (I). Hence conclusion I follows. 
 
Again, All cats are dogs (A) + (No animal is a dog (E) - ) conversion - No dog is an animal = A + E = E = No cat is an animal.
 
Hence, conclusion II follows.

Hence, option C is correct.
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