A beaker contains a fluid of density $\rho kg/m^3$ , specific heat $SJ/kg^{\circ}C$ and viscosity $ n$ The beaker is filled up to height h. To estimate the rate of heat transfer per unit are $(Q/A)$ by convection when beaker is put on a hot plate, a student proposes that it should depend on $n$. $\bigg(\large\frac{S \Delta \theta}{h}\bigg)$ and $\bigg(\large\frac{1}{\rho g}\bigg)$ When $\Delta \theta (in \; ^{\circ}C)$ is the difference in the temperature between the bottom and top of the fluid. In that situation the correct option for $(Q/A)$ is :
