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Which of the above factors can be a limiting factor for t...

Use the information below on factors required during photosynthesis to answer the following question

I. CO2
II. Chlorophyll
III. Water
IV. ATP V NADPH2

Which of the above factors can be a limiting factor for the process to proceed? 

A.

I and II only

B.

I and III only

C.

I and IV only

D.

I, III and IV only

Correct answer is A

No explanation has been provided for this answer.