Money supply is a stock concept measured at a specific point in time, not over a period of time, making statement (i) incorrect.
Statement (ii) is incorrect because the government’s stock of money is not included in money supply.
Statement (iii) is also incorrect as money supply includes currency held by the public, not with the Central Bank.
Since all three statements are incorrect, the correct answer is (D) (i), (ii), and (iii).

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?