Given table shows the `CO_(2)` compensation point and optimum `CO_(2)` concentration for photosynthesis for `C_(3)` and `C_(4)` plants.
`|(ul(" " C_(3) " Plants" " " C_(4)" Plants")),(ul(underset("point")(CO_(2)" compensation")" "25-100 "ppm" " "A " ")),(ul(underset("cocentration")("Optimum " Co_(2)) " " "B 360 ppm"))|`
Select the correct values for A and B.

Options

A. `{:(A,B),(0.50"ppm",300"ppm"):}`
B. `{:(A,B),(0-10"ppm",450"ppm"):}`
C. `{:(A,B),(100-150"ppm",250"ppm"):}`
D. `{:(A,B),(100-110"ppm",290"ppm"):}`

Answer

B

Explanation

`CO_(2)` compensation poin t or threshold value is that concentration of `CO_(2)` at which illuminated plant parts parts stop absorbing carbon dioxide from their enviroment. At this value, `CO_(2)` fixed in photosynthesis is equal to `CO_(2)` evolved in respiration and photorespiration. The value is 25-100 ppm compensation value for `C_(4)` plants is the greater efficiency of `CO_(2)`-fixation through PEP-carboxylase. The optimum `CO_(2)` concentration for `C_(4)` plants is 360 ppm and for `C_(3)` plants, it is 50ppm.