Redox Reactions and Electrochemistry: JEE Main 2026 Chemistry question

Consider the following electrochemical cell : $\mathrm{Pt\,|\,O_2(g)(1\,bar)\,|\,HCl(aq)\,||\,M^{2+}(aq, 1.0\,M)\,|\,M(s)}$. The pH above which, oxygen gas would start to evolve at anode is ________ (nearest integer). [Given : $E^\circ_{\mathrm{M^{2+}/M}}=0.994$ V, $E^\circ_{\mathrm{O_2/H_2O}}=1.23$ V (standard reduction potentials) and $\frac{RT}{F}(2.303)=0.059$ V at the given condition]