Answer: Arjan Dev
Notes: Guru Ram Das Ji appointed his youngest son, Guru Arjan Dev, as his successor in 1581. Guru Arjan Dev became the fifth Sikh Guru and compiled the Adi Granth, laying the foundation for Harmandir Sahib (Golden Temple).
📌 Question Number: 116 in Medieval Punjab - Sikh Gurus and Sikh Religion in the above course in App.