GMP for ayurvedic, siddha and unani medicines are covered by

Option A: Schedule U
Schedule U relates to requirements and guidelines for manufacturing and labeling of cosmetics.
It's not about ayurvedic, siddha, or unani medicines.

Option B: Schedule T
This schedule deals with GMP requirements for Ayurvedic, Siddha, and Unani medicines.
This is the correct answer!

Option C: Schedule W
Schedule W deals with list of drugs which are to be marketed under generic names only.
Not related to GMP for traditional medicines.

Option D: Schedule M
Schedule M provides GMP requirements for pharmaceutical products (like allopathic medicines).
While important for medicine manufacturing, it's not specifically for ayurvedic, siddha, and unani systems.

Therefore, the correct answer is B: Schedule T because it specifically addresses the Good Manufacturing Practices for Ayurvedic, Siddha and Unani medicines.