Which of the following statements is/are correct?

(i) An increase in the estimated useful life of a non-current (fixed) asset reduces the annual depreciation charge.

(ii) A reduction in the estimated residual value of a non-current (fixed) asset decreases the annual depreciation charge.

(iii) If the sales proceeds of a non-current (fixed) asset are greater than its net book value, this indicates insufficient charge of depreciation in the income statements

(profit and loss accounts) of previous years.

Is it

(a) (i) only

(b) (ii) only

(c) (i) and (ii) only

(d) (i), (ii) and (iii)