Prostaglandins(PGs)have effects on a variety of tissues.The different prostaglandins may have different effects.Which of the following statements is not correct:

• A. the human arteriolar smooth muscle is relaxed by PGE2 and PGI2,where as TXA2 and PGF2 Alpha cause vasoconstriction
• B. PGE1 and PGI2 inhibit platelet aggregation,where as TXA2 facilitate aggregation
• C. PGE2 has marked oxytocic action while PGF2 Alpha has tocolytic action
• D. PGE2 is bronhodilator whereas PGF2 alpha is a bronchoconstrictor