Average rainfall of Bihar is

110 cm
112 cm
115 cm
120 cm

The correct answer is A. 110 cm.

Bihar is a state in eastern India. It is the third-largest state in India by population and the 13th-largest by area. The state is located in the Gangetic plain and is bounded by Uttar Pradesh to the north, Jharkhand to the south, West Bengal to the east, and Nepal to the north-east. The capital of Bihar is Patna.

The average annual rainfall in Bihar is 110 cm. The rainfall is highest in the monsoon season, which runs from June to September. The monsoon rains are essential for the state’s agriculture.

The options B, C, and D are incorrect because they are not the average annual rainfall in Bihar.