The question presents an Assertion (A) and a Reason (R) regarding the teachings of Baba Guru Nanak Dev Ji, the founder of Sikhism, and asks for the evaluation of their correctness and correlation.
Assertion (A): Baba Guru Nanak Dev Ji advocated Nirguṇa Bhakti.
Reason (R): For Baba Guru Nanak Ji, the absolute or 'rab' had no gender or form.
Let's analyze both statements:
Based on the above explanations, both the Assertion (A) and Reason (R) are correct. Moreover, the Reason (R) accurately explains why the Assertion is true. Therefore, the correct answer is: Assertion (A) is correct and Reason (R) is the correct explanation of Assertion (A).