Duncan Passage is a strait located between two islands. The correct answer is option 1, South and Little Andaman.

Option 1: South and Little Andaman

Duncan Passage is situated between South Andaman Island and Little Andaman Island. These two islands are located in the Andaman Sea, part of the Bay of Bengal. The passage serves as a navigational corridor for ships traveling between these two islands.

Option 2: Little and Great Nicobar

This option is incorrect. Little Andaman and Great Nicobar are not connected by Duncan Passage. Great Nicobar is located further south of Little Andaman, and there are other straits and channels separating these two islands.

Option 3: North and Middle Andaman

This option is incorrect. Duncan Passage does not separate North and Middle Andaman. Instead, it lies to the south of these islands.

Option 4: Middle and South Andaman

This option is incorrect. Duncan Passage does not separate Middle and South Andaman. It is located to the south of South Andaman Island.

Alert - Correct answer should be:

Duncan Passage is located between South Andaman and Little Andaman.