The correct answer is: b) Monsoon months (June-September).
The Kharif season is the rainy season in India. It is the time of year when most of the country’s annual rainfall occurs. The Kharif season is important for agriculture, as it is the time when most crops are planted.
The Kharif season in Bihar coincides with the monsoon months of June to September. The monsoon is a seasonal wind that blows from the southwest to the northeast across India. The monsoon brings heavy rains to the country, which are essential for agriculture.
The other options are incorrect because they do not coincide with the monsoon months. The summer months are April to June, the winter months are October to March, and the spring months are February to April.