Option 1: Kerala is not as large as Austria. It is a small state in the southwestern part of India.
Option 2: This is the correct answer. West Bengal is roughly as large as Austria. It is a state located in the eastern part of India.
Option 3: Orissa, also known as Odisha, is not as large as Austria. It is a state located on the eastern coast of India.
Option 4: Karnataka is not as large as Austria. It is a state in the southern part of India.
In conclusion, the correct option is 2, West Bengal, as it is approximately as large as Austria.