A photosynthesising plant is releasing ¹⁸O more than the normal. The plant must have been supplied with

A. O₃

B. H₂O with ¹⁸O

C. CO₂ with ¹⁸O

D. C₆H₁₂O₆ with ¹⁸O

Answer: Option B

Solution(By Examveda Team)

A photosynthesizing plant is releasing ¹⁸O more than normal. The plant must have been supplied with H₂O with ¹⁸O.
Ruben, Hassid and Kamen (1941) using a heavy isotope of oxygen, `<sup>18</sup>O` in water, found that oxygen evolved in photosynthesis comes from water evolution of oxygen does not require carbon dioxide.