' X ' is a polymer, which is mainly used for making unbreakable cups and laminated sheets. The monomers of ' X ' are

• Correct answer
  A

  Urea and formaldehyde
• B

  Ethylene glycol and phthalic acid
• C

  Phenol and formaldehyde
• D

  1,3-Butadiene and styrene

Hence, the correct answer is option: 'A'.