Answer
The major product would be 4,4-dimethyl-2-pentanol.
Work Step by Step
The products are racemic. Since its hydroboration, the OH would attach the least substituted carbon and form 4,4-dimethylpentan-2-ol. There will also a little bit of 4,4-dimethylpentan-3-ol because of the steric hindrance to the attack of $BH_3$.
