Answer: Option (C) is correct.
Step-by-step explanation:
Given that,
Currency held by the public = 2,000 econs
Bank reserves = 300 econs
Desired reserve/deposit ratio = 15 percent
If Commercial banks borrow 100 econs in reserves from the Central Bank.
= 0.15
= 0.15
Deposits =

= 2000
Money supply = Currency held by the public + Deposits
= 2,000 + 2,000
= 4,000
Money multiplier =
=

= 6.67
Increase in money supply = Borrowing amount × Money multiplier
= 100 x 6.67
= 667
Hence, money supply increases from 4,000 econs to 4,667 econs.