state gov APPSC (ఆంధ్రప్రదేశ్) Group 2 (Pre + Mains) Mock Test 2023 General Knowledge Ecology and Environment Environmental pollution
Consider the following statement about the Oil spills:
1. Oil spills at sea decrease the Dissolved Oxygen (DOs) in the water and cause harm to the organisms.
2. Oil spills at sea decreases the Chemical oxygen demand (COD) in the water and cause harm to the organisms.
3. Using bioremediation techniques, TERI has developed a mixture of bacteria called oil zapper which degrades the pollutants of oil-contaminated sites.
Which of the above statement/s is/are correct?
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2, and 3