Consider the following statements regarding waste stabilization ponds:1. The pond has a symbiotic process of waste stabilization through algae on one hand and bacteria on the other2. The oxygen in the pond is provided by algae through photosynthesis3. The detention period is of the order of two to three days4. The bacteria which develop in the pond are aerobicWhich of the above statements are correct?

• A. 1 and 2 only
• B. 2 and 3 only
• C. 3 and 4 only
• D. 1 and 4 only