The correct answer is the 15th Bengal Native Infantry.
- The battalion that rebelled at Nasirabad in 1857 was the 15th Bengal Native Infantry.
- The first rebellion in Rajasthan took place on 28 May 1857 at Naseerabad
- News of Meerut Rebellion AGG (Agent to Governor-General) George Patrick Lawrence and he sent the 15th Bengal Native Infantry based at Ajmer to Nasirabad, causing discontent among the soldiers.
- Soon the news of the revolt of the soldiers reached the soldiers in Nasirabad as well and on 28 May 1857, the soldiers of the Native Infantry revolted in Nasirabad.
- The soldiers of the 30th Native Infantry also joined in and after burning and capturing the soldiers of the cantonment left for Delhi.
Additional Information
6 British Cantonments in Rajasthan are:
| Cantonment Zone | District |
| Naseerabad | Ajmer |
| Devali | Tonk |
| Erinpura | Pali |
| Kota | Kota |
| Kherwara | Udaipur |
| Beawar | Ajmer |

