Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2/sec.D1 = diffusion co-efficient; cm2/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm3/sec. V = volume, cm3.) ?
A. Reactor dispersion number (D/vL)
B. Reduced time (vt/V)
C. Thiele modulus L √(k/D1)
D. None of these