Which of the following is a man-made substance? May 29, 2021 / By Preparation Point / Assistant (BS-16) Punjab Employees Social Security Institution Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedInA) Plastic B) Rubber C) Steel D) Iron Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn