Which of the following statements are true about aerosols in the atmosphere? Choose the correct answer from the options given below:
1.Aerosols include sea salts, fine soil, smoke, pollens and soot.
2.Aerosols in the air contribute to the various hues of red and orange at sunrise and sunset.
3.The concentration of aerosols is maximum in the mesosphere.
4.Aerosols act as surfaces on which water vapour condenses.
A1 and 3 only
B2 and 3 only
C1, 2 and 4 only
D3 and 4 only
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