Q. What was the tenure of Guru Arjan Dev Ji as Sikh Guru?
Answer: 1581-1606
Notes: Guru Arjan Dev Ji was the fifth Sikh Guru from 1581 to 1606. He compiled the Adi Granth, constructed Harmandir Sahib (Golden Temple), and was the first Sikh Guru to be martyred. His tenure marked major developments in Sikhism's core religious and social structure.