Which of the following substances is responsible for causing Minamata disease?

1. Lead
2. Fluorides
3. Arsenic
4. Mercury

Which of the following processes is responsible for the depletion of oxygen from the water body?

1. Biomagnification
2. Bioaccumulatiom
3. Eutrophication
4. Oxygen cycle

Chernobyl disaster occurred on April 26, 1986 due to

1. Oil spillage
2. Overflow of river water
3. Meltdown in a nuclear reactor
4. Leakage of poisonous gas

The process by which the toxic compound enter a food chain & increases its concentration in the tissues of organism as it travels up the food chain is called

1. Eutrophication
2. Biomagnification
3. Bioradiation
4. Bioaccumulation