Answer: The right answer is the Doctrine of Lapse.
- The Doctrine of Lapse was the annexation policy devised by Dalhousie.
- Lord Dalhousie was the Governor General from 1848 to 1856.
- He played the role in the final wave of annexations of many kingdoms.
- As per this policy, a kingdom would lapse and come under the East India Company; if the kingdom did not have a male heir when the ruler died.
- Using the Doctrine of Lapse, Satara was annexed by the British in 1848.
- Under the Doctrine of Lapse, Sambalpur was annexed by the British in 1850.
- Udaipur was annexed in 1852.
- Kingdoms of Nagpur and Jhansi were annexed in 1853 and 1854 respectively, under the Doctrine of Lapse.
- Finally the Kingdom of Awadh was annexed in 1856.