أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
All the the options would qualify as cash equivalents instruments if the treasury bond is short term(i.e near maturity -or maturity of less than one year) hence low interest rate risk which is usually associated with longer term bonds.
Cash equivalent instruments are those that can easily be converted to cash without risk of
significant change in value should the need arise and since there is no qualification on the maturity of treasury bond, we can assume that it has a longer maturity hence not a cash equivalent.
I hope this helps.