Consider the graph of \(G i b b s\) free energy \(G\) vs Extent of reaction. The number of statement/s from the following which are true with respect to points \((a), (b)\) and \((c)\) is \(.................\) \(A.\)Reaction is spontaneous at \((a)\) and \((b)\) \(B.\)Reaction is at equilibrium at point \((b)\) and nonspontaneous at point \((c)\) \(C.\)Reaction is spontaneous at \((a)\) and nonspontaneous at \((c)\) \(D.\)Reaction is non-spontaneous at \((a)\) and \((b)\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.