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

Options

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

Answer

A