Explanation:

- Let's examine the latitudes of each location to determine which is the northernmost.

- New Delhi, India sits at approximately 28.61° N latitude.

- Kathmandu, Nepal is located around 27.71° N latitude.

- Thimphu, Bhutan is situated at approximately 27.47° N latitude.

- Dhaka, Bangladesh lies near 23.81° N latitude.

- From these comparisons, New Delhi is clearly the northernmost city.

Correct Answer: Option 1 — New Delhi