If W is load on a circular slab of radius R, the maximum radial moment at the centre of the slab is-

• A. \(\frac{{W{R^2}}}{{16}}\)
• B. \(\frac{{3W{R^2}}}{{32}}\)
• C. \(\frac{{W{R^2}}}{{32}}\)
• D. \(\frac{{3W{R^2}}}{{16}}\)