Read the following paragraph and determine if the hypothesis is true:

Edwina Cynthia Annette Mountbatten, Countess Mountbatten of Burma, ("nee" Ashley; 28 November 1901 21 February 1960) was an English heiress, socialite, relief worker and the last Vicereine of India as wife of Louis Mountbatten, 1st Earl Mountbatten of Burma.

Hypothesis: Edwina Cynthia Annette Mountbatten, Countess Mountbatten of Burma, was still alive on 10 June 1954.
No