In an ideal gas mixture consisting of components \(A\) and \(B\), the partial pressure of component \(A\) is equal to

(a) \(p_{\mathrm{A}}=\frac{n_{\mathrm{A}}-n_{\mathrm{B}}}{N}\)

(b) \(p_{\mathrm{A}}=\frac{N}{n_{\mathrm{A}}+n_{\mathrm{B}}}\)

(c) \(p_{\mathrm{A}}=\frac{n_{\mathrm{A}}+n_{\mathrm{B}}}{N}\)

(d) \(p_{\mathrm{A}}=\frac{N}{n_{\mathrm{A}}-n_{\mathrm{B}}}\).