Question

what do you mean by policy of doctrine of lapse?

Answer 1

This policy was introduced by Lord Dalhousie. According to this policy if any indian ruler died without a male heir or successor,his kingdom would be annexed by the Britishers.
Major states which were annexed by britishers were Jhansi,Jaipur,Nagpur,Udaipur..

Answer 2

According to this policy if a ruler died without leaving any natural ruler to rule the kingdom that kingdom will be annexed to the britishers.