An organic compound B is formed by the reaction of ethylmagnesium iodide `(CH_(3)CH_(2)MgI)` with a substance A, followed by treatment with dilute aqueous acid. Compound B does not react with `PC C` in dichloromethane. Identify A ?
A. `CH_(3)- overset(O) overset(||)(C)-H`
B. `CH_(3)CH_(2)overset(O)overset(||)(C)CH_(3)`
C. `H_(2)C= O`
D.
