Assertion A: As per realist theory, State exists in an anarchic international system, characterised by the absence of an authoritative hierarchy.Reason R: States in international system can rely only on themselves.

• A. Both A and R are true, but R is not the correct explanation.
• B. Both A and R are false.
• C. A is true, but R is false.
• D. Both A and R are true and R is the correct explanation.