What is the product of Hydroboration-oxidation of but-$1$-ene?

$CH_3-CH=CH-CH_3 \xrightarrow[R_2O_2, \Delta]{HBr} \text{ (Anti-Markownikoff's addition)}$
Comment on the optical activity of the products.

The major product obtained in the following reaction is

Some addition reactions of alkene are given below. Identify the one which fits on $ALL$ the given criteria.
Reaction must have-
$(A)$ Stereochemistry of addition - $SYN$ $ONLY$
$(B)$ Regiochemistry of addition - $ANTI-MARKOVNIKOV$ $OR$ $ANTI-MARKOVNIKOV$ $LIKE$

In the reaction given below,the product would be: $CH_3-CH=CH-CH_3 \xrightarrow{H_3O^{+}} CH_3-CH_2-CH(OH)-CH_3$

The intermediate during the addition of $HCl$ to propene in the presence of peroxide is