The world's population is expected to increase by ......... persons in the next 30 year as per the World Population Prospects 2019. - Study24x7
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The world's population is expected to increase by ......... persons in the next 30 year as per the World Population Prospects 2019.

A

3 billion

B

2.9 billion

C

2.5 billion

D

2 billion

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