Which one among the following statements is correct?
(a) The Revolt of 1857 was not supported by the Nizam of Hyderabad
(b) Dinabandhu Mitra was the author of the book, Unhappy India
(c) The Sindhias of Gwalior gave shelter to the Rani of Jhansi
(d) Mangal Pandey led the Sepoys March to Delhi
