The correct option is
C (P)-(ii), (Q)-(i),(R)-(iv),(S)-(iii)
(P) Liquid have a definite volume as the particles are in contact with each other.
(Q) Gas is highly compressible as there is a huge distance between the gas molecules.
(R) Plasma (fourth state of matter) is a gas that has been energized to a point that some of the e− break free from but travel with their nucleus. A spark in the gas creates plasma.
(S) Bose-Einstein Condensate is formed by cooling a gas of extremely low density. It is the fifth state of matter.