Solution

The formation of vulcanised rubber-
To improve these physical properties,
water repelent
Less water absorption
Resist for oxidising agents
Strength
a process of vulcanisation is carried out. This process consists of heating a mixture of raw rubber with sulphur and an appropriate additive at a temperature range between 373 K to 415 K.On vulcanisation, sulphur forms cross links at the reactive sites of double bonds and thus the rubber gets stiffened, The correct option is [C].