Explanation:

- Option 1: Arun Jaitley

- Arun Jaitley was a prominent leader in the Bharatiya Janata Party (BJP) and served as the Leader of Opposition in the Rajya Sabha, not the Lok Sabha, during 2009.

- Option 2: Sushma Swaraj

- Sushma Swaraj was indeed appointed as the Leader of Opposition in the 15th Lok Sabha in 2009.

- This marked her term from 2009 to 2014 as a prominent leader in the Lok Sabha.

- Option 3: Anantha Kumar

- Anantha Kumar was a senior BJP leader, but he was not appointed as the Leader of Opposition in the Lok Sabha.

- Option 4: Smriti Irani

- Smriti Irani is a well-known leader in the BJP, but in 2009, she was not serving as the Leader of Opposition in the Lok Sabha.