Explanation:

- A.R. Rahman is a renowned Indian music composer.

- Option 1: Lagaan – The soundtrack was composed by A.R. Rahman, but it did not win a Grammy.

- Option 2: Dil Se – Also had music by Rahman, but no Grammy Award was won for it.

- Option 3: Slumdog Millionaire – This is the correct option. A.R. Rahman won two Grammy Awards in 2010 for Best Compilation Soundtrack and Best Song Written for Visual Media for the film "Slumdog Millionaire."

- Option 4: Roja – Marked Rahman’s debut, but did not win any Grammy.

- "Slumdog Millionaire" brought Rahman international recognition and Grammy wins.