Dr. Baba Saheb Ambedkar was associated with.

A) Presidency College, Kolkata
B) Khalsa College, Mumbai
C) Siddharth College, Mumbai
D) Milind College, Aurangabad
E) National College, Bengaluru

Choose the most appropriate answer from the options given below.

The correct option is Only B, C, D.

Let us verify and understand the association of Dr. B. R. Ambedkar with each of the colleges listed in the question:
1. Presidency College, Kolkata (A): Dr. Ambedkar was not directly associated with the establishment or administration of Presidency College in Kolkata.
2. Khalsa College, Mumbai (B): Dr. Ambedkar played a significant role in the establishment of Guru Nanak Khalsa College of Arts, Science & Commerce in Mumbai (then Bombay) in 1937, alongside the Shiromani Gurdwara Parbandhak Committee (SGPC).
3. Siddharth College, Mumbai (C): Siddharth College of Arts, Science & Commerce was founded in Mumbai in 1946 by the People's Education Society, which was established by Dr. B. R. Ambedkar himself.
4. Milind College, Aurangabad (D): Milind College was established in Aurangabad in 1950 by the People's Education Society, founded by Dr. B. R. Ambedkar, and he was deeply involved in its foundation to promote higher education in the Marathwada region.
5. National College, Bengaluru (E): Dr. Ambedkar was not associated with the establishment or management of National College in Bengaluru.

Therefore, Dr. Ambedkar was associated with Khalsa College, Mumbai (B), Siddharth College, Mumbai (C), and Milind College, Aurangabad (D).