Pick out the wrong unit conversion of calorific value.

$1$ kcal$/$kg $=1\mathrm{.}8$ BTU$/$lb $=4\mathrm{.}186$ kJ$/$kg

$1$ BTU$/$ft$3=8\mathrm{.}9$ kcal$/$m$3=0\mathrm{.}038$ MJ$/$m$3$

$1$ BTU$/$lb $=2\mathrm{.}3$ kcal$/$kg

$1$ kcal$/$m$3=0\mathrm{.}1124$ BTU$/$ft$3$