The intermediate J in the following Wittig re | vedclass

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(A) The Wittig reaction involves the reaction of a phosphonium ylide with a carbonyl compound to form an alkene. $1$. The phosphonium salt reacts with

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(A) The Wittig reaction involves the reaction of a phosphonium ylide with a carbonyl compound to form an alkene. $1$. The phosphonium salt reacts with a strong base like $n-BuLi$ to form the phosphorus ylide. $2$. The ylide then undergoes a $[2+2]$ cycloaddition with the carbonyl compound (formaldehyde, $CH_2=O$) to form a four-membered ring intermediate known as an oxaphosphetane. $3$. This oxaphosphetane intermediate $J$ subsequently decomposes to form the alkene and triphenylphosphine oxide. $4$. The structure of the oxaphosphetane intermediate $J$ is a four-membered ring containing carbon, oxygen, and phosphorus atoms, where the carbon is also attached to the cyclopentyl group. Option $A$ correctly represents this oxaphosphetane structure.

The intermediate $J$ in the following Wittig reaction is

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