Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Knowledge Ecology and Environment
What is the significance of Ozone layer in atmosphere?
1
It maintains the cycle of seasons
2
It causes timely arrival of Monsoon
3
It filters the ultraviolet rays of the sun
4
More than one of the above
5
None of the above