Identify the incorrect statement from the following.

 

In the aquatic food chain, pesticides such as DDT are not metabolised at any trophic level.

Metals that have the density of > 5 $\mathrm{g}/{\mathrm{cm}}^3$ are called heavy metals.

Minamata disease is developed due to pollution of Hg in water.

Wastewater including sewage can be treated in an integrated manner, by utilising a mix of artificial and natural processes. An initiative by FOAM is an example for this.