The correct option is B Gwalior
The Doctrine of Lapse was an annexation policy introduced by Lord Dalhousie. It was based on the idea that in case a ruler of dependent state died childless, the right of ruling over the State lapses to the sovereign. It was used by him to annex the independent Indian States such as the States of Satara, Jaipur, Sambhalpur, Baghat, Udaipur, Jhansi and Nagpur.