Explanation:

- Option 1: Jounpur

- This option is not relevant to Humayun going into exile. There is no major historical context related to Humayun’s exile in Jounpur.

- Option 2: Chousa

- The Battle of Chausa took place in 1539 against Sher Shah Suri. Humayun was defeated but did not go into exile after this battle.

- Option 3: Mandasore

- There’s no significant battle linked to Humayun's exile in Mandasore. This option is irrelevant to the context.

- Option 4: Bilgram

- This is the correct answer. The Battle of Bilgram (also known as the Battle of Kannauj) in 1540 was fought against Sher Shah Suri. Humayun was decisively defeated and subsequently went into exile.

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