Section 34 of the Arbitration and Conciliation Act, 1996, provides a limited and exhaustive list of grounds on which a court can set aside an arbitral award. The objective is to ensure minimal judicial intervention. The grounds listed in the section include:
\[\begin{array}{rl} \bullet & \text{A party being under some incapacity.} \\ \bullet & \text{The arbitration agreement not being valid.} \\ \bullet & \text{(C) The party making the application was not given proper notice or was otherwise unable to present his case.} \\ \bullet & \text{(B) The award deals with a dispute not contemplated by or falling within the terms of the submission to arbitration, or it contains decisions on matters beyond the scope of the submission.} \\ \bullet & \text{The composition of the arbitral tribunal was not in accordance with the agreement.} \\ \bullet & \text{(A) The court finds that the subject-matter of the dispute is not capable of settlement by arbitration or the arbitral award is in conflict with the public policy of India.} \\ \end{array}\]
Since all the options are valid grounds, the correct answer is (D).