Which of the following reactions will yield $2,2\text{-dibromopropane}$?

In the reaction of propyne with $\text{HBr}$:Step 1: Addition of one mole of $\text{HBr}$ follows Markovnikov's rule. The electrophile ${\text{H}}^{+}$ adds to the terminal carbon to form a more stable $2^{\circ }$ carbocation.
$${\text{CH}}_3\text{-C}\equiv \text{CH}\stackrel{\text{HBr}}{\to }{\text{CH}}_3{\text{-C(Br)=CH}}_2$$
Step 2: Addition of the second mole of $\text{HBr}$ also follows Markovnikov's rule. The ${\text{Br}}^{-}$ adds to the carbon already containing a bromine atom (due to resonance stabilization of the intermediate carbocation by the lone pair of bromine).
$${\text{CH}}_3{\text{-C(Br)=CH}}_2\stackrel{\text{HBr}}{\to }{\text{CH}}_3{\text{-C(Br)}}_2{\text{-CH}}_3$$
The product is $2,2\text{-dibromopropane}$.