The correct answer is option 1: USA, Canada, and Mexico. NAFTA stands for the North American Free Trade Agreement. It is an agreement between three countries - the United States, Canada, and Mexico. NAFTA was established in 1994 with the goal of eliminating trade barriers and promoting economic cooperation between these three countries.

Option 2, USA, Canada, and India, is incorrect because India is not a member of NAFTA. India is not located in North America and therefore is not a part of this trade agreement.

Option 3, USA, Canada, and Japan, is also incorrect. Although Japan is an important trading partner for the United States and Canada, it is not a member of NAFTA.

Option 4, USA, UK, and India, is also incorrect. The United Kingdom is not a member of NAFTA. They have their own separate trade agreements and relationships with the United States and Canada.

In conclusion, the correct members of NAFTA are the United States, Canada, and Mexico.