Answer:
III and IV
Step-by-step explanation:
As if the greatest the number of years for maturity, the chances of the risk is high also the long term bonds contains the high rate of interest as compared with the medium or short term bonds
Also if the fund replace with the medium to long term so the rate of interest could be highly charged that earned more income also if the rate of interest is increased the yield also increased
So based on the given option, the third and fourth option is correct