Hex-3-yne is converted into hexane-3,4-diol by the sequences below. Which sequence(s) give the meso diol?

1. A$\mathrm{H}{}_2$, Lindlar catalyst; then cold dilute alkaline $\mathrm{KMnO}{}_4$
2. BNa / liquid $\mathrm{NH}{}_3$; then a peracid, followed by $\mathrm{H}{}_3\mathrm{O}{}^{+}$
3. C$\mathrm{H}{}_2$, Lindlar catalyst; then a peracid, followed by $\mathrm{H}{}_3\mathrm{O}{}^{+}$
4. DNa / liquid $\mathrm{NH}{}_3$; then cold dilute alkaline $\mathrm{KMnO}{}_4$