The reaction of sec-butylmagnesium bromide with formaldehyde followed by hydrolysis yields?

Question

2,2-dimethyl-1-pentanol
2-butanol
2-methyl-1-butanol
2-pentanol
2,2-dimethyl-1-propanol

Answer 1

The magnesium bromide group on the #2 carbon of the butyl chain is replaced by a -CH2OH. The longest chain on this product has 4 carbon atoms.