The correct option is A Ingenhousz
Photosynthesis
is a process by which green plants manufacture their food with the help of
carbon dioxide and water in the presence of sunlight. It was discovered by Jan
Ingenhousz. Through his experiments, he showed that sunlight is essential for
the plant process that helps to somehow purify the air fouled by the breathing
mouse and the burning candle in Priestley's bell jar experiment. In another
experiment with an aquatic plant (Hydrilla), he showed that in bright sunlight,
small bubbles were formed around the green parts of the plant while in dark, no
bubbles were formed. Thus, the correct answer is option A.