If Ω denotes the number of microstates, V, U are volume and internal energy respectively, which of the following gives statistical definition of pressure P ?
1
\(\left(\mathrm{KT} \frac{\partial \ln \Omega}{\partial \mathrm{V}}\right)^{-1}\)
2
\(\mathrm{~K} \frac{\partial \ln \Omega}{\partial \mathrm{V}}\)
3
\(\mathrm{K}\left(\frac{\partial \ln \Omega}{\partial \mathrm{V}}\right)^{-1}\)
4
\(\mathrm{KT} \frac{\partial \ln \Omega}{\partial \mathrm{V}}\)