The current birth rate per thousand is 42, where as corresponding death rate is 22 per thousand. The net growth rate in terms of population increase in percent is given by?	Choose the correct choice from the following answers
A) 2.0%
B) 3.2%
C) 3.9%
D) 4%
E) 5.1%
Net growth on 1000 = 42-22= 
<gadget id="calculator">42-22</gadget>
<output>20</output>
20   Net growth on 100= 20*100/1000= 
<gadget id="calculator">20*100/1000</gadget>
<output>2</output>
2.0%   2.0%nswer is 2.0%
<result>A</result>
The current birth rate per thousand is 42, where as corresponding death rate is 22 per thousand. The net growth rate in terms of population increase in percent is given by?