2023 Geography - Climatology

With reference to the Earth's atmosphere, which one of the following statements is correct?

• The total amount of insolation received at the equator is roughly about 10 times of that received at the poles.
• Infrared rays constitute roughly two-thirds of insolation.
• Infrared waves are largely absorbed by water vapour that is concentrated in the lower atmosphere.
• Infrared waves are a part of visible spectrum of electromagnetic waves of solar radiation.