The Sieder$-$Tate correlation for heat transfer in turbulent flow in pipe gives Nu Re$0\mathrm{.}8,$ where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co$-$efficient varies with the pipe diameter $($D$)$ as

D$-1\mathrm{.}8$

D$-0\mathrm{.}2$

D$0\mathrm{.}2$

D$1\mathrm{.}8$