Study the given life cycle of cellular slime moulds and select the incorrect option.
P. Structure (i) is formed in response to drought conditions and exhaustion of food supply.
Q. Structure (ii) represents myxamoeba, which rounds off and is converted to a spore.
R. (iii) are uninucleate, haploid structures without any cell wall.
S. (iv) are uninucleate, haploid structures possessing a conspicuous cell wall.