The correct answer is: c) 40-50°C.
Bihar is a state in eastern India. It is one of the hottest states in India, with an average temperature of 30°C. The temperature can rise to 40°C or more during the summer months of April, May, and June. The high temperatures can be uncomfortable and even dangerous, so it is important to take precautions such as staying hydrated and wearing loose-fitting clothing.
Option a) 20-30°C is incorrect because the average temperature in Bihar is 30°C. The temperature can be lower than this in the winter months, but it is rarely below 20°C.
Option b) 30-40°C is incorrect because the average temperature in Bihar is 30°C. The temperature can be higher than this in the summer months, but it is rarely above 40°C.
Option d) 50-60°C is incorrect because the average temperature in Bihar is 30°C. The temperature can be higher than this in the summer months, but it is rarely above 50°C.