The correct answer is: C. Nawada
Noonachar is a traditional dish of the Mithila region of India. It is made from rice flour, milk, sugar, and spices. It is a sweet dish that is often served during festivals and special occasions.
Maithili is a language spoken in the Mithila region. It is a member of the Indo-Aryan language family.
Katihar is a district in the Indian state of Bihar. It is located in the north-eastern part of the state.
Nawada is a district in the Indian state of Bihar. It is located in the south-eastern part of the state.
Gaya is a city in the Indian state of Bihar. It is located in the south-central part of the state.
Noonachar is not a popular dish in any of the other regions mentioned in the question.