Which of the following statements is/are correct?
(i) All green plants can prepare their own food.
(ii) Most animals are autotrophs.
(iii) Carbon dioxide is not required for photosynthesis.
(iv) Oxygen is liberated during photosynthesis.
(i) and (iv)
All green plants can prepare their own food and oxygen is liberated during photosynthesis. These are the correct statements. Most animals are heterotrophs as they are directly or indirectly dependent on plants for food. Carbon dioxide is essential for photosynthesis.