Examples of synthetic polymer (X) and semi - synthetic polymer (Y) are

Options

A. `{:(X," "Y),("Polythene"," ""Rayon"):}`
B. `{:(X," "Y),("Rayon"," ""Nylon6,6"):}`
C. `{:(X," "Y),("Rubber"," ""Polythene"):}`
D. `{:(X," "Y),("Cellulose nitrate"," ""PVC"):}`

Explanation

Synthetic polymers are human -made polymer they can be classified into four main categories
(i) thermoplastics (ii) thermosets
(iii) elastomers (iv) synthetic fibers
e.g. Polythene

Semi synthetic polymer
A semi synthetic polymer is a polymer made by chemically treating a natural polymer.
e.g rayon Rayon is derived from naturally occurring cellulose.