If \(\overline{X_{Ri}}\) is the mean conversion of a reactant of particle size Ri, Rm is the particle of maximum size in the feed and F(Ri) is the fraction of Ri fed to the reactor, then the mean conversion of solids of a particular size ‘i’ leaving a plug flow reactor converting a mixture of particles of varying sizes is ____

• A. \(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[1- X(B)Ri]\(\frac{F(Ri)}{F} \)
• B. 1-\(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[ XRi]\(\frac{F(Ri)}{F} \)
• C. 1-\(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[1-X(B)Ri] F (Ri)
• D. 1-\(\overline{X_{(B)Ri}} = ∑_{R(τ)}^{Rm}\)[1-X(B)Ri] \(\frac{F(Ri)}{F} \)