The correct option is D The Sikh community commonly accepts that Guru Nanak Ji undertook three Udasis.
The number of Udasis undertaken by him is a subject of debate. According to Puratan Janam Sakhi and Vars of Bhai Gurudas, Guruji undertook four Udasis. Some historians claim that he went on five of these journeys. But according to historians, Dr. Fauja Singh and Dr. Kirpal Singh, Guruji undertook three Udasis and this is universally accepted by the Sikh community.