In oxidative photophosphorylation, the last 3 steps are as follows [Orissa JEE 2004] \[Q\to C\to a{{a}_{3}}\to {{O}_{2}}\]

• A. \[Q\to C\] is \[{{H}^{+}}\] absorbing site
• B. \[a{{a}_{3}}\to {{O}_{2+}}{{H}^{+}}\] yielding site
• C. \[Q\to C\] is \[{{H}^{+}}\] yielding site and \[a{{a}_{3}}\to {{O}_{2}}\] is \[{{H}^{+}}\] absorbing site
• D. No \[{{H}^{+}}\] is absorbed or released