What is the major product obtained from the debromination of meso-$2,3$-dibromobutane?

For the chemical reactions shown below,identify the correct statement from the following:

Write the halogenation reaction of alkenes.

In hydroboration-oxidation reaction $:-$
$I$. Syn addition takes place
$II$. Reaction proceeds through the formation of a cyclic transition state
$III$. Vicinal diol is obtained as a product
$IV$. Anti-addition takes place and Anti-Markovnikov rule is followed
Which of the following statement$(s)$ is/are correct $:-$

Reagent $A$ may be:

In the reaction $C_2H_5CH = CH_2 + H - X \rightarrow$ Product,what is the major product?