Which of the following statements concerning bonds is (are) correct? l. Municipal bonds have lower yields than Treasury bondS. all. Low coupon bonds have higher yields than high coupon bonds. :lll. General obligation bonds yield more than revenue bonds.:IV Initially, callable bonds have higher yields than noncallable bonds. a. I and Il only b. I and IV only Oc. I, IlIl and IV only d. II and IV only