PPSC Assistant Sub Inspector (2020) Anti-Corruption, Everyday Science MCQs, PPSC Solved Past Papers MCQsThe Inner core of an optical fiber is _____ in composition ? Posted on March 26, 2021April 29, 2021 by Rana TahirA. Glass or Plastic B. Cooper C. Bimetallic D. LiquidShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)