I want to know the answer to the following question:
Which kingdom did the Chola navy attack during the 11th century?
All the background I'm provided with is that "Soon after that, the king of Kedah Phra Ong Mahawangsa became the first ruler to abandon the traditional Hindu faith, and converted to Islam with the Sultanate of Kedah established in year 1136.". Is that enough to answer the question?
Answer: no