Q.
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a
Increasing atmospheric CO2 concentration up to 0.05% can enhance CO2 fixation rate.
b
C3 plants respond to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum.
c
Tomato is a greenhouse crop which can be grown in CO2-enriched atmosphere for higher yield.
d
Light saturation for CO2 fixation occurs at 10% of full sunlight.
answer is B.
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