Boyle's Iaw may be expressed as

• A

  ${\left(\frac{\mathrm{dp}}{\mathrm{dV}}\right)}_{\mathrm{T}}=\frac{\mathrm{k}}{\mathrm{V}}$

• B

  ${\left(\frac{\mathrm{dp}}{\mathrm{dV}}\right)}_{\mathrm{T}}=−\frac{\mathrm{k}}{{\mathrm{v}}^2}$

• C

  ${\left(\frac{\mathrm{dp}}{\mathrm{dV}}\right)}_{\mathrm{T}}=\frac{{\mathrm{k}}^2}{\mathrm{V}}$

• D

  $\mathrm{V}∝\frac{1}{\mathrm{p}}$