Rectified spirit is a mixture of

If two liquids $A$ and $B$ form a minimum boiling azeotrope at some specific composition,then which statement among the following is correct?

$A$ mixture of two completely miscible non-ideal liquids which distils without change in its composition at a constant temperature as though it were a pure liquid. This mixture is known as:

Rectified spirit obtained by fermentation contains $4.5 \%$ of water. To remove this water,rectified spirit is mixed with a suitable quantity of benzene and heated. Benzene helps because:

The boiling point of an azeotropic mixture of water-ethanol is less than that of both water and ethanol. Then

Azeotropic mixtures are