This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Thromboxane A2, 
Select and explain. 
A. Formed by platelets, B. Formed from PGG,IPGR, C. Prothrombotic, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Formed by platelets; 'b' i.e., Formed from PGG2/PGH2 ; 'c' i.e., Prothrombotic Thromboxane A2 (TXA21 o TXA, is synthesized by platelets from arachidonic acid PGG2 and PGH2 intermediate through cycloxygenase pathway. o It is a potent inducer of platelets aggregation --> prothrombotic activity. o It is a vasoconstrictor.