While working in the kitchen, clothes of Priya catches fire accidentally causing severe burns. The person is most likely wearing clothes made of :
Terylene
Synthetic fibres melt on heating. If they catch fire, they melt and stick to the body of the person wearing them. That is why it is preferred not to wear clothes made of synthetic fibre while working in the kitchen. Terylene is a synthetic polyester fibre so it will give more severe burns than any other fibre mentioned.
Natural fibres (Cotton, Flax) and Semi-synthetic fibre (Rayon) burn but don't melt and stick to the body.