Final answer:
The composition that includes dialogues between Guru Nanak Dev Ji and the 'Sidhas' in Guru Granth Sahib Ji is called 'Sidh Gosht'.
Step-by-step explanation:
The composition in Guru Granth Sahib Ji that records the dialogues Guru Nanak Dev Ji had with the 'Sidhas' is known as Sidh Gosht (Answer A). These dialogues are a part of the Sikh scripture and reflect the teachings of Guru Nanak Dev Ji, providing deep insights into the principles and philosophies of Sikhism compared to the ascetic practices of the Sidhas.
The text embodies the Sikh ethos of direct communion with God and emphasizes the importance of living a truthful and responsible life in society as opposed to renouncing the world for spiritual realization.