A gas container \(\mathbf{A}\) is in thermal equilibrium with another gas of the same mass in container \(\mathbf{B}\). If we denote the corresponding pressures and volumes by the suffixes \(\mathbf{A}\) and \(\mathbf{B}\), then which of the following statement is most likely to be true.

1. A \(\mathrm{P}_{\mathrm{A}}=\mathrm{P}_{\mathrm{B}}, \mathrm{V}_{\mathrm{A}} \neq \mathrm{V}_{\mathrm{B}}\)
2. B \(\mathrm{P}_{\mathrm{A}} \neq \mathrm{P}_{\mathrm{B}}, \mathrm{V}_{\mathrm{A}}=\mathrm{V}_{\mathrm{B}}\)
3. C \(\mathrm{P}_{\mathrm{A}} \mathrm{V}_{\mathrm{B}}=\mathrm{P}_{\mathrm{B}} \mathrm{V}_{\mathrm{A}}\)
4. D \(\mathrm{P}_{\mathrm{A}} \mathrm{V}_{\mathrm{A}}=\mathrm{P}_{\mathrm{B}} \mathrm{V}_{\mathrm{B}}\)