For the pipe fitting like elbow, tee, union etc., which of the following is preferred?

Question: For the pipe fitting like elbow, tee, union etc., which of the following is preferred?
[A].

Pig iron

[B].

Malleable iron

[C].

Spheroidal graphite cast iron

[D].

High carbon steel

Answer: Option B

Explanation:

No answer description available for this question.