What is the structural difference between thromboxanes and prostaglandins?

• A. Thromboxanes have an aromatic ring, while prostaglandins have a cyclopentane ring.
• B. Thromboxanes have a cyclopentane ring, while prostaglandins have a six-membered ring with an ether group.
• C. Thromboxanes have a six-membered ring with an ether group, while prostaglandins have a cyclopentane ring.
• D. Thromboxanes have three conjugated double bonds, while prostaglandins have a cyclopentane ring.

Answer: (C)