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Either Ravana is a demon, or he is a hero. A. Ravana is a hero. B. Ravana is a demon. C. Ravana is not a demon. D. Ravana is not a hero.

CD only
BA only
CD and BA
DB and CA

Correct Answer: DB and CA

Explanation:

It is an example of either a or b type:
CD a → - b that is logically incorrect.
BA a → b that is also logically incorrect.
DB b → a that is also logically correct
CA - a → b that is also logically correct

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