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In a measurement of quantum efficiency o...

In a measurement of quantum efficiency of photosynthesis in green plants, it was found that 10 quanta of red light of wavelength 6850 Å were needed to release one molecule of `O_(2)`. The average energy storage in this process for 1 mol `O_(2)` evolved is 112 Kcal.
What is the energy conversion efficieny in this experiment?
Given: 1 cal =4.18 J, `N_(A)=6xx10^(23),h=6.63xx10^(-34)` J.s

A

23.5

B

26.9

C

66.34

D

73.1

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