A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this? <br>(i) Lots of urea and phosphate fertilizer were used in the crops in the vicinity <br> (ii) the area was sprayed with DDT by an aircraft <br> (iii) The lake water turned green and stinky <br> (iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis <br>Which two of the above were the main causes of fish mortality in the lake?

Question

( A ) (iii), (iv)
( B ) (i), (ii)
( C ) (i), (iii)
( D ) (ii), (iii)