Match the polymers in column-A with their main uses in column-B and choose the correct answer:

Column - A                         Column - B
A. Polystyrene             i. Paints and lacquers
B. Glyptal                        ii. Rain coats
C. Polyvinyl chloride     iii. Manufacture of toys
D. Bakelite                      iv. Computer discs

We begin by carefully recalling the characteristic properties and typical applications of each polymer listed in column-A. This memory-based approach is essential because, in polymer chemistry, the end-use of a plastic or resin is guided directly by its physical properties such as hardness, flexibility, thermal resistance and electrical insulation.

First, we consider polystyrene. This polymer is obtained by the free-radical polymerisation of the monomer styrene $$\left(C_6H_5CH{=}CH_2\right)$$. It is a hard, brittle, transparent thermoplastic that can be fabricated into a variety of shapes. Because of its rigidity and ability to be moulded with fine detail, it is widely used in the manufacture of toys, model kits, disposable cutlery, etc. So, we associate

Polystyrene $$\;\; \longrightarrow \;\;$$ Manufacture of toys (iii) $$.$$

Next, we look at glyptal. Chemically, glyptal is an alkyd resin formed by the condensation polymerisation of glycerol with phthalic anhydride. Alkyd resins possess excellent film-forming ability, gloss and durability. Owing to these properties, glyptal is predominantly employed in the formulation of paints and lacquers. Therefore,

Glyptal $$\;\; \longrightarrow \;\;$$ Paints and lacquers (i) $$.$$

Now we turn to polyvinyl chloride, abbreviated as PVC. It is produced by the polymerisation of vinyl chloride $$\left(CH_2{=}CHCl\right)$$. PVC is tough, chemically inert and can be made flexible by adding plasticisers. Soft, plasticised PVC is extensively used for making rain coats, shower curtains, and other water-proof articles. Consequently, we have

Polyvinyl chloride $$\;\; \longrightarrow \;\;$$ Rain coats (ii) $$.$$

Finally, we examine bakelite, the very first synthetic plastic, obtained by the condensation of phenol with formaldehyde. Bakelite is hard, heat-resistant and an excellent electrical insulator. Because of these attributes it finds use in electrical goods such as switches, plugs and also in moulded items like computer discs (e.g., old-style floppy-disk casings and related components). Thus,

Bakelite $$\;\; \longrightarrow \;\;$$ Computer discs (iv) $$.$$

Collecting all four correspondences, we obtain

$$ \begin{aligned} A &: \text{Polystyrene} &\longrightarrow&\; \text{(iii) Manufacture of toys},\\[2pt] B &: \text{Glyptal} &\longrightarrow&\; \text{(i) Paints and lacquers},\\[2pt] C &: \text{Polyvinyl chloride} &\longrightarrow&\; \text{(ii) Rain coats},\\[2pt] D &: \text{Bakelite} &\longrightarrow&\; \text{(iv) Computer discs}. \end{aligned} $$

This exact sequence of matches corresponds to the option written as

A - iii, B - i, C - ii, D - iv.

Hence, the correct answer is Option A.