(A) to make it smooth and frictionless
(B) to make it rust-proof
(C) to reduce heat loss by radiation
(D) to make it more durable
(A) to make it smooth and frictionless
(B) to make it rust-proof
(C) to reduce heat loss by radiation
(D) to make it more durable
Note: if you think the answer of the question is wrong or changed with time, Comment below with right answer or its better to contact us via “Contact us page” for quick update. We will really appreciate your contribution.