Which resembles in properties with wool?
A. Acrylic
B. Orlon
C. Acrilan
D. All of these

Hint: Wool is a natural fibre that is obtained from sheep and other animals.
Fibres are the polymers that have the strongest intermolecular forces of attraction and therefore have tensile strength and elasticity. The strong intermolecular force also results in close packing of chains which imparts the polymer crystalline nature. As a result, these polymers have sharp melting points. These strong intermolecular forces are due to hydrogen bonding in Nylon, 66 (polyamide) and dipole-dipole interactions in Terylene (polyester) and polyacrylonitrile (Orlon, Acrilan, etc.)

Complete step by step answer:
Acrylic, Orlon, and Acrilan are artificial and man-made fibres which resembles in properties with wool and is cheaper than actual wool and is colored with many dyes and sold in the market,
They are made up of polyacrylonitrile and are used in making clothes, sweaters, carpets, and blankets.
After discussing we can conclude that Acrylic, Orlon, and Acrilan have properties that resemble wool.

So, the correct answer is Option D .

Note: Natural fibres vs Synthetic fibres
Natural fibres are obtained from plants and animals whereas synthetic fibres are made by humans by chemical synthesis.Natural fibres have natural colours whereas synthetic fibre colour is added as per requirement.There is a chance of having impurities or dust in the natural fibre whereas in synthetic fibre there is no chance of having dust or impurities.The durability of synthetic fibres is more than natural fibres.