Which one of them was not a prophecy/rumour of the 19th century?

The Britishers had mixed the bone dust of crows and cats into the flour that was sold in the market.

The correct answer is Option 2 - The Britishers had mixed the bone dust of crows and cats into the flour that was sold in the market.

Option 1- New cartridges were greased with the fat of cows and pigs.
Option 2- The Britishers had mixed the bone dust of crows and cats into the flour that was sold in the market. (INCORRECT)
Option 3- There was fear and suspicion that the British wanted to convert Indians to Christianity.
Option 4- The British government had hatched a gigantic conspiracy to destroy the caste and religion of Hindus and Muslims.

CORRECTION in option 2: The rumours said the British had mixed the bone dust of cows and pigs into the flour that was sold in the market. In towns and cantonments, sepoys and the common people refused to touch the atta.

There were many rumours that were circulating in North India at the beginning of 1857. There was a rumour that the British government had hatched a gigantic conspiracy to destroy the caste and religion of Hindus and Muslims. To this end, the rumours said, the British had mixed the bone dust of cows and pigs into the flour that was sold in the market. In towns and cantonments, sepoys and the common people refused to touch the atta. There was fear and suspicion that the British wanted to convert Indians to Christianity. Panic spread fast. British officers tried to allay their fears, but in vain. These fears stirred men to action. The response to the call for action was reinforced by the prophecy that British rule would come to an end on the centenary of the Battle of Plassey, on 23 June 1857.