Correct option is D
Balata belts are made from
waterproof materials coated with
balata gum.
These belts are
resistant to acidic and wet conditions, making them suitable for applications in harsh or damp environments.
Balata belt material can with stand acidic and wet conditions it is formed by vegetable gum, extrude as sap from trees. It is 20% stronger than rubber belts. It have high toughness, less elastic, fully acid and water proof.
