Explanation

Lord Dalhousie, the Governor-General known for the Doctrine of Lapse, described Awadh as a cherry that will drop into our mouth one day, coveting its annexation. Awadh was duly annexed in 1856 on the pretext of misgovernment, shortly before the 1857 revolt. He did not use this phrase for Delhi, Jhansi or Gwalior. Hence option B is correct.