Which is better investment 11% stock at 143 or `9 3/4%` stock at 117? (a) 11% stock at 143 (b) `9 3/4%` stock at 117 (c) both are equally good (d) Cannot be compared, as the total amount of investment is not given

which is better investment: 7.5% stock at 105 or 6.5% stock at 94

Which is better investment,12% stock at par with an income tax at the rate of 5 paise per rupee or 14(2)/(7)% stock at 120 free from income tax? (a) 12% stock (b) 14(2)/(7)% stock (c) Both are equally good (d) Cannot be compared