Explanation:

Dr. B.R. Ambedkar was a prominent social reformer and politician who fought for the rights of the marginalized communities in India. Among the parties listed:

The Peasants and Workers Party of India was not established by Dr. B.R. Ambedkar.

The All India Scheduled Castes Federation was established by Dr. B.R. Ambedkar to address the issues and concerns of the Scheduled Castes.

The Independent Labour Party was also established by Dr. B.R. Ambedkar to work for the rights and welfare of laborers.

Therefore, Dr. B.R. Ambedkar established two out of the three parties listed above, making the correct answer: 2 (Only Two).