Explanation:

All codes are correct.

• A Free Trade Agreement (FTA) is an agreement between two or more countries to reduce trade barriers in imports and exports among them.

• It includes goods, services, investment, intellectual property, competition, government procurement and other areas.

• This concept of free trade is the opposite of trade protectionism or economic isolationism.

The list of FTAs signed by India is as under:

• India-Sri Lanka Free Trade Agreement (FTA)

• Agreement on South Asian Free Trade Area (SAFTA) (India, Pakistan, Nepal, Sri Lanka, Bangladesh, Bhutan, the Maldives and Afghanistan)

• India-Nepal Treaty of Trade

• India-Bhutan Agreement on Trade, Commerce and Transit

• India-Thailand FTA - Early Harvest Scheme (EHS)

• India-Singapore Comprehensive Economic Cooperation Agreement (CECA)

• India-ASEAN CECA - Trade in Goods, Services and Investment Agreement (Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, Philippines, Singapore, Thailand and Vietnam)

• India-South Korea Comprehensive Economic Partnership Agreement (CEPA)

• India-Japan CEPA

• India-Malaysia CECA

• India-Mauritius Comprehensive Economic Cooperation and Partnership Agreement (CECPA)

• India-UAE CEPA (*)

• India-Australia Economic Cooperation and Trade Agreement (ECTA) (*)

• (*) Signed, but yet to be implemented.

Hence option 4th is correct.