The correct answer to the question "How many States of India border Myanmar" is option 2 - Three.

To understand this, we need to look at the geography of India and Myanmar. Myanmar is located to the east of India, sharing a border with several states.

Firstly, the state of Arunachal Pradesh is located in the northeastern part of India and shares a border with Myanmar. This makes it the first state that borders Myanmar.

Secondly, Nagaland, which is also located in the northeast of India, shares a border with Myanmar. This is the second state that borders Myanmar.

Finally, Manipur, also located in the northeastern part of India, shares a border with Myanmar as well. This is the third and final state that borders Myanmar.

Therefore, the correct answer is option 2 - Three states of India (Arunachal Pradesh, Nagaland, and Manipur) border Myanmar.