55.MEDICINE

X was the discoverer of something which has been termed " the discovery of the Millenium" by some Swedish magazines. Y is considered as one of the best wartime administrators ever. There is a myth connecting X and Y. The myth states that Y's father paid for X's education after X's father saved Y. This has been termed by X as "A wondrous fable". Y was infact saved by a product codenamed M&B as announced by Y later. A statue of X stands outside the main bullring in Madrid. Y's ancestor was the first Duke of Marlborough.

Identify X and Y.