The question asks you to match the locations of different National Institutes of Indian systems of medicine with their respective institutes.

Option 1: A-4, B-2, C-1, D-3.

Option 2: A-3, B-1, C-2, D-4.

Option 3: A-4, B-1, C-2, D-3.

Option 4: A-3, B-2, C-1, D-4.

According to the correct answer, Option 3, the correct match is A-4, B-1, C-2, D-3.

Institute of Unani Medicine is located in Bengaluru (National Institute), Institute of Homoeopathy is located in Jaipur (National Institute), Institute of Ayurveda is located in Chennai (National Institute), and Institute of Siddha is located in Kolkata (National Institute).

Therefore, the correct answer is option 3.