The diagram shows the structure of a fungal cell with different parts labelled as $A, B, C$ and $D.$ Which of the following statements is true with regard to the fungal cell structure?

(i) $A$ contains mucopolysaccharides which are also present in the exoskeleton of insects and crustaceans.
(ii) $D$ are usually more than one in number in the case of aseptate hyphae.
(iii) Carotenes and xanthophylls are present in $C,$ which harvest light energy for photosynthesis.
(iv) $B$ is the reserve food material, usually stored in the form of starch and oil.

Sexual reproduction in fungi is carried out by the fusion of compatible nuclei from two parents at a definite stage in the life cycle. Identify the different types of sexual reproduction occurring in fungi from the given figures and select the correct option.

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.