Question

what is doctrine of lapse explain it

Answer 1

doctrine of lapse is policy followed by Britishers and lord dalhousie used this policy to capture Indian state. Jhansi and Udaypur are such cities.

Answer 2

Like the policy of Subsidiary Alliance, the Doctrine of Lapse was also introduced. The doctrine of lapse clearly stated that a dependent/ subsidiary state would pass into the British hands if the ruler died without a natural successor.