India is a member nation of which Regional Trade Block?

The correct answer is Option (3) → South Asian Free Trade Agreement (SAFTA)

3) South Asian Free Trade Agreement (SAFTA): SAFTA was established to promote regional economic integration among South Asian countries. It came into effect on January 1, 2006, with the goal of reducing trade barriers and fostering economic cooperation within the South Asian region. SAFTA member countries include Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka.