Consider the equilibrium data for methanol-water system at $1$ bar given in the future below.

A distillation column operating at $1.0$ bar is required to produce $92 \: mol \: \%$ methanol. The feed is a saturated liquid. It is an equimolar mixture of methanol and water. The minimum reflux ratio is

1. $0.33$
2. $0.50$
3. $0.54$
4. $1.17$