Pak Study MCQsThe system of Dyarchy was in operation from 1921 to? Posted on April 15, 2021 by Rana Amir KhanA. 1930 B. 1935 C. 1937 D. 1940Share 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)