Answer: option B is correct
Explanation: In simple words demand deposit is similar to those funds held in a checking account. Demand deposits serves as the base of the money supply of the country.
Demand deposit can be computed using following formula :-
[tex]=\:\frac{demand\:deposit}{required\:reserve\:ratio}[/tex]
[tex]=\:\frac{1,000,000}{20\%}=\:\$5,000,000[/tex]