Step 1: Understanding the Question.
The arbitration proceedings can be terminated under various circumstances as provided in the Arbitration and Conciliation Act, 1996. These include the final arbitral award, interim award, or an order by the arbitral tribunal for termination.
Step 2: Analysis of Options.
- (A) 1 and 3: This combination is incomplete as it misses the interim award.
- (B) 1 and 2: This combination is incomplete as it misses the arbitral tribunal's order for termination.
- (C) 2 and 3: This combination also misses the final arbitral award.
- (D) 1.2 and 3: This is the correct answer, as all three circumstances (final award, interim award, or tribunal order) can result in termination of proceedings.
Step 3: Conclusion.
Thus, the correct answer is (D) 1.2 and 3.