The correct answer is A. Cwg.
Köppen’s climate classification is a system that classifies climate into five main climate groups, with each group being divided into several subtypes. The five main climate groups are:
- A: Tropical climates
- B: Dry climates
- C: Temperate climates
- D: Continental climates
- E: Polar climates
The subtypes of each climate group are based on the average temperature and precipitation of the region.
The climate of North Bihar is classified as Cwg because it has a warm, humid subtropical climate with hot, humid summers and mild, dry winters. The average temperature in North Bihar ranges from 20°C (68°F) in January to 35°C (95°F) in May. The average annual precipitation is 1,200 mm (47 in).
The other options are incorrect because they do not accurately describe the climate of North Bihar. Option B, Aw, is a tropical savanna climate with a hot, dry season and a warm, wet season. Option C, Caw, is a Mediterranean climate with warm, dry summers and cool, wet winters. Option D, CBW, is a continental climate with hot, dry summers and cold, snowy winters.
I hope this explanation is helpful. Please let me know if you have any other questions.