$Ice \underset{b}{\overset{a}{\rightleftarrows }}water \underset{d}{\overset{c}{\rightleftarrows }}$  water vapor

i) ‘a’ is a physical change

ii) Process ‘d’ is called condensation

iii) Process ‘b’ is a chemical change

iv) All Ice, water, and water vapor are made up of $H_{2}O$  molecules only.

The correct observation for the following reaction is

$Ice\underset{b}{\overset{a}{\rightleftarrows }}water\underset{d}{\overset{c}{\rightleftarrows }}$  water vapor

i) ‘a’ is a physical change

ii) Process ‘d’ is called condensation

iv) All Ice, water, and water vapor are made up of $H_{2}O$  molecules only.