What is the maximum in plane shear stress on the wall of a thin cylinder, if it has a diameter of d, the thickness of t and the gauge pressure in the cylinder is p?

• A. \(\frac{{pd}}{t}\)
• B. \(\frac{{pd}}{{4t}}\)
• C. \(\frac{{pd}}{{2t}}\)
• D. \(\frac{{pd}}{{8t}}\)