25. Which of the following statements is correct about sinking fund provision? i. Under sinking fund provision, different bond certificates may have different maturity periods ii. A sinking-fund provision is an obligation and must be carried out regardless of market conditions iii. A sinking fund call typically requires call premium to be paid to the holder if market interest rate has fallen. (a) Statement (i) only is correct (b) Statement (ii) only is correct (c) Statements (i) and (ii) only are correct (d) Statements (ii) and (iii) only are correct (e) Statements (i), (ii) and (iii) are all correct