Which of the following country is not a member of ASEAN?

Nepal

The correct answer is Option 4 - Nepal

NEPAL is not a member of ASEAN.

ASEAN was established in 1967 by five countries of this region — Indonesia, Malaysia, the Philippines, Singapore and Thailand — by signing the Bangkok Declaration.
The objectives of ASEAN were primarily to accelerate economic growth and through that ‘social progress and cultural development’. A secondary objective was to promote regional peace and stability based on the rule of law and the principles of the United Nations Charter.