The Graph Below Represents a Temperature Versus Energy Plot for a Pure

The graph below represents a temperature versus energy plot for a pure substance. Identify the point(s) where...
(i) only gas exists
(ii) both solid and liquid exist

A) (i) 7 (ii) 2 and 3
B) (i) 7 (ii) 5 and 6
C) (i) 1 (ii) 2 and 3
D) (i) 4 (ii) 5 and 6
E) (i) 4 (ii) 2 and 3