You get a call from someone saying they are from your organization's IT department.

[answerhappygod]

You get a call from someone saying they are from your organization's IT department. They claim there was a security incident, and they need you to provide your username and password to check if your account was compromised. What's the best response?

Hang up and call your IT department using a trusted method of communication to verify the request.
Give them your username and password to fix the problem since it's related to an urgent security incident.
End the call and check with your co-workers to see if they got the same call.