Consider the following statements:

1. Subsidence of the western flank of the Peninsula disturbed the earlier symmetrical drainage arrangement.
2. Himalayan uplift was accompanied by subsidence and trough faulting along the northern Peninsular margin.
3. A slight northwest-to-southeast tilt helped orient much of the drainage towards the Bay of Bengal.
4. Deposition within the Narmada and Tapi trough faults produced extensive alluvial plains and large deltas.

Which of the statements given above are correct?