A
They synthesize carbohydrates from carbon dioxide and water in the presence of sunlight
and chlorophyll
B
They store carbohydrates in the form of starch
C
They convert carbon dioxide and water into carbohydrates in the absence of sunlight
D
They constitute the first tropic level in food chains
Solution:
The Correct option is C i.e., They convert carbon dioxide and water into carbohydrates in the absence of sunlight