Which of the following alkenes does not undergo anti-Markovnikov addition of $HBr$?

Rank the following alkenes in order of decreasing heats of hydrogenation (largest first):
$1$. $1-$butene
$2$. $2-$methyl$-2-$butene
$3$. trans$-2-$butene
$4$. cis$-2-$butene

Addition of bromine to $1, 3-$butadiene gives

The reaction of $CH_3-CH=CH_2$ (propene) with $HI$ gives isopropyl iodide instead of $n$-propyl iodide because:

$A$ and $B$ respectively are:
$A \xrightarrow[(2) Zn-H_2O]{(1) O_3} \text{Ethane-}1,2\text{-dicarbaldehyde} + \text{Glyoxal}$
$B \xrightarrow[(2) Zn-H_2O]{(1) O_3} 5\text{-oxohexanal}$

$But-1-ene \xrightarrow[(ii) NaBH_4]{(i) (CH_3COO)_2Hg/H_2O} ?$
The product in the above reaction is: