In the Cannizzaro reaction given below:
`2Ph-CHO overset(overset(Θ)OH)rarrPh-CH_(2)OH+PhCO_(2)^(-)` the slowest step is:

Options

A. The attack of - OH at the carbonyl group
B. The transfer of hydride to the carbonyl group.
C. The abstraction of proton from the carboxylic acid.
D. The deproatonation of Ph -`CH_(2)` OH.

Answer

B

Explanation

This is a fact that the determining step of the cannizarro reaction is the step of hydride transfer to the other carbonyl group.