Observe the following graph of blackman’s law of limiting factor with more than one factor select the correct answer

                       

 

 

 

 

 

I) At ‘A’ no photosynthesis occurs

 II) Rate of photosynthesis will increases from ‘A’ to ‘C’ as chlorophyll as a limiting factor

III) Rate of photosynthesis is constant along line ‘C’ to ‘D’

 IV) Rate of photosynthesis is less along the lines ‘E’ to ‘F’