The order of susceptibility of nucleophilic attack on aldehydes follows the order

Options

A. `1^@ gt 3^@ gt 2^@`
B. `1^@ gt 2^@ gt 3^@`
C. `3^@ gt 2^@ gt 1^@`
D. `2^@ gt 3^@ gt 1^@`

Answer

B

Explanation

`R-underset(O)underset(||)overset(+delta)C-H` , Susceptibility of nucleophilic attack on aldehyde is decreased by electron releasing effect of R group. Decreasing order of aldehyde towards nucleophilic attack is `1^@ gt 2^@ gt 3^@` R group.