General Knowledge - Basic General Knowledge - Discussion
Discussion Forum : Basic General Knowledge - Section 7 (Q.No. 9)
9.
The ozone layer restricts
Discussion:
2 comments Page 1 of 1.
Ummama khan said:
8 years ago
I like this question because it is useful but I want an explanation for this.
Raziq said:
8 years ago
When the ultraviolet rays touch our skin.
The oil in skin converted into vitamin-D.
The oil in skin converted into vitamin-D.
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