Initial weight of candle=x gm, the Final weight of candle after burning=y gmWhich of the following option is correct?
Once, Kavita visited a tailor shop and brought home some cuttings of fabric to study their properties. She took two pieces and found that one of the pieces (X) was shrinking when it was burnt with a candle. However, the other piece (Y) did not shrink on burning. Identify the material X and Y.