The correct answer is (b), Gonda.
Nawabganj Bird Sanctuary is a bird sanctuary located in the Gonda district of Uttar Pradesh, India. It is spread over an area of 1,000 hectares (2,500 acres) and was established in 1982. The sanctuary is home to a variety of birds, including flamingos, pelicans, herons, storks, and egrets. It is also a popular spot for bird watching.
The other options are incorrect. Ghaziabad is a district in the Indian state of Uttar Pradesh. It is located in the National Capital Region (NCR) and is one of the most populous districts in India. RaeBareli is a district in the Indian state of Uttar Pradesh. It is located in the Awadh region and is known for its historical and cultural heritage. Unnao is a district in the Indian state of Uttar Pradesh. It is located in the Awadh region and is known for its temples and mosques.