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Question
Which of the following statement is/are correct?
Options:
A .  Corona is produced by refraction by water droplets.
B .  Halo is produced by diffraction in ice crystals.
C .  Though corona and halo is produced by different phenomena, the colour sequence produced in them remains the same.
D .  Halo is an indication of approaching bad weather.
Answer: Option D
Answer: (d)
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