The correct answer is Gujarat.

Gujarat is a state in western India known for its arid and semi-arid climate. A significant portion of Gujarat experiences low rainfall, especially in the regions of Kutch and Saurashtra. These areas receive less than 50 centimeters of annual rainfall, classifying them as low rainfall areas. This is largely due to the state's geographical location, which is shielded from the monsoon winds by the Aravalli Range and the presence of the Thar Desert. Other options mentioned experience relatively higher rainfall compared to Gujarat, mainly due to their proximity to the Bay of Bengal and the influence of the monsoons.

In contrast, Bihar receives rainfall from both the southwest and northeast monsoons. Tripura, located in the northeastern region, experiences higher rainfall due to the Bay of Bengal's influence and orographic rainfall. Meghalaya, also in the northeast, is renowned for its exceptionally high rainfall, making it one of the wettest regions in the world.

Therefore, based on its geographical location and climatic conditions, Gujarat is the state that most accurately fits the description of a low rainfall area.