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Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Consider the following statements about UV rays

1. UV-C have the shortest wavelength among all three types of UV rays.
2. UV-A is completely absorbed by Ozone layer.
3. Humans have large exposure to UV-A radiations.

Which of the above statements are correct?

A
1 only
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B
2 and 3 only
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C
1 and 3 only
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D
1, 2 and 3
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Solution

The correct option is C 1 and 3 only
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> 1. UV-C have the shortest wavelength among all three types of UV rays.
2. UV-C is completely absorbed by Ozone layer.
3. Humans have large exposure to UV-A radiations.

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