Explanation:

- The Living Root Bridges are an extraordinary natural and cultural phenomenon.

- They are created by training the roots of rubber trees over years to span rivers and streams.

- These bridges are primarily found in the northeastern state of India.

- Option 1: West Bengal

- This state is known for its cultural heritage and landscapes.

- However, it does not host the Living Root Bridges.

- Option 2: Meghalaya

- Known for its beautiful landscapes and rich cultural heritage.

- The Living Root Bridges are uniquely concentrated here.

- Cherrapunji and Mawlynnong are popular locations for these bridges.

- Option 3: Sikkim

- Known for its scenic beauty and monasteries.

- It does not have Living Root Bridges.

- Option 4: Mizoram

- This state has scenic hills and rich tribal culture.

- It does not have Living Root Bridges.

- Option 5: None of the above

- Since Meghalaya is the correct answer, this option is incorrect.

The correct answer is option 2, Meghalaya.