You are working as a financial analyst for a local Savings & Loan bank. Suppose that under the current law, you are required to hold a $10\%$ required reserve. A new deposit comes in of $$5,000.$ In order to fulfill the requirement, you decide to purchase $$550$ in Treasury bills. Would this be a correct way of fulfilling the requirement?

a$.$ Yes, as the requirement of $$500$ minimum is met.

b$.$ No$,$ as there must be at least $$500$ in either cash or Federal Reserve deposits.

c$.$ No$,$ as the requirement is $$500$ and not $$550.$

d$.$ No$,$ as money market securities are forbidden in any type of reserve.