Explanation:

- Option 1: 1935

- In 1935, Einstein, along with Boris Podolsky and Nathan Rosen, formulated the famous EPR paradox.

- This year is not related to the prediction of the Bose-Einstein condensate.

- Option 2: 1924

- In 1924, Albert Einstein extended the work of Satyendra Nath Bose.

- He predicted the existence of a new state of matter, known as the Bose-Einstein condensate (BEC).

- Correct Answer

- Option 3: 1930

- In 1930, Einstein was involved in discussions with Niels Bohr about quantum mechanics.

- However, this year does not relate to BEC.

- Option 4: 1919

- In 1919, Einstein was recognized for the confirmation of his general theory of relativity during a solar eclipse.

- This date is not connected to the Bose-Einstein condensate.