Which of the following statements is incorrect?

• A
  Polar stratospheric clouds $(PSCs)$ are clouds formed over Antarctica.
• B
  Acid rain dissolves heavy metals such as $Cu, Pb, Hg$ and $Al$ from soil,rocks and sediments.
• C
  $H_2SO_4$ is the major contributor to acid rain,$HNO_3$ ranks second and $HCl$ third in this respect.
• D
  Fishes grow equally well in warm and cold water.