PPSC Past Paper Divisional Coach 2019 Solved MCQ, Everyday Science MCQs, PPSC Solved Past Papers MCQsOur immunity system is based on? Posted on April 28, 2021 by Rana TahirA. Plasma B. Red Blood Cells C. White Blood Cells D. None of theseShare 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)
