The correct answer is: b) Humid subtropical climate
Bihar experiences a humid subtropical climate, which is characterized by hot, humid summers and mild, dry winters. The average temperature in Patna, the capital of Bihar, ranges from 20°C (68°F) in January to 38°C (100°F) in May. The average annual rainfall is about 1,200 mm (47 in).
A tropical wet climate is characterized by hot, humid summers and short, dry winters. The average temperature in a tropical wet climate ranges from 25°C (77°F) to 30°C (86°F). The average annual rainfall is about 2,000 mm (80 in).
A humid subtropical climate is characterized by hot, humid summers and mild, dry winters. The average temperature in a humid subtropical climate ranges from 18°C (64°F) to 26°C (79°F). The average annual rainfall is about 1,000 mm (39 in).
A semi-arid climate is characterized by hot, dry summers and cool, wet winters. The average temperature in a semi-arid climate ranges from 15°C (59°F) to 25°C (77°F). The average annual rainfall is about 500 mm (20 in).
An arid desert climate is characterized by hot, dry summers and very cold winters. The average temperature in an arid desert climate ranges from 10°C (50°F) to 30°C (86°F). The average annual rainfall is about 250 mm (10 in).