Answer:
Option (C) is correct.
Step-by-step explanation:
Demand deposits = 1000 million dias 
 Excess reserves = 25 million dias 
 
Percent of demand deposits held as excess reserves = 25% 
 
Therefore, 
when 5 million dias are loaned by Central bank, keeping the excess reserves and demand deposits constant, 
Banks can create credit = (1 ÷ 25)% 
 = 4 times or 0.04 
Money supply of Namdia change: 
= Demand deposits × 0.04 
= 1,000 × 0.04 
= 40 million dias