place the syringe on top of the container so it will not roll off
force the syringe into the top of the container as well as it will fit
put the syringe into her pocket and dispose of it in another room
Number 1 is correct.
Rationale: The full container should be replaced with a new one. Sharps should never be placed on top of the container or forced into it, as this increases the risk of a needlestick injury. A dirty sharp should never be placed in a pocket because it is now contaminated from the client, even if the safety device is covering the needle.