Identify the fibre \((\mathrm{X})\) and elastomer \((\mathrm{Y})\) from the following

1. A \(\begin{array}{|c|c|}
   \hline \underline{X} & \underline{Y} \\
   \hline \text { Dacron } & \text { Neoprene } \\
   \hline
   \end{array}\)
2. B \(\begin{array}{|c|c|}
   \hline \underline{\mathrm{X}} & \underline{Y} \\
   \hline \text { Novolac } & \text { Polystyrene } \\
   \hline
   \end{array}\)
3. C \(\begin{array}{|c|c|}
   \hline \underline{\mathrm{X}} & \underline{Y} \\
   \hline \text { Teflon } & \text { Buna - S } \\
   \hline
   \end{array}\)
4. D \(\begin{array}{|c|c|}
   \hline \text { X } & \underline{Y} \\
   \hline \text { Glyptal } & \text { Polypropene } \\
   \hline
   \end{array}\)