Correct option is (b)
(A) Natural rubber latex - (2) cis− polyisoprene
Natural rubber is a linear polymer of isoprene (1-Methyl-1,3-butadiene) and is also called cis- 1,4-polyisoprene. It is obtained from the bark of latex trees.
(B) Wood laminates - (3) Urea-formaldehyde resins
Urea-formaldehyde polymer is used in the manufacture of wood laminates.
(C) Ropes and fibers - (4) Nylon
Nylon-6 is used in the manufacture of tyre cords, fabrics and ropes.
(D) Unbreakable crockery - (1) Melamine formaldehyde resin
Melamine-formaldehyde resins are used in the manufacture of unbreakable crockery.
