wrong answer i think

[BManager]

I think you have a wrong answer:

You are configuring a Microsoft client to call a PPP server using CHAP. Only the client will be authenticated, but the client’s password has expired and must be changed. Which PPP server configuration allows the call to be completed?
ppp authentication chap callin
ppp autherwntication chap
ppp authentication ms-chap-v2
ppp authentication ms-chap-v2 callin
ppp authentication ms-chap callin


correct me if i'm wrong but you have answer has ppp authentication ms-chap-v2 but i think the answer is ppp authentication ms-chap-v2 callin
https://www.cisco.com/c/en/us/support/docs/wan/point-to-point-protocol-ppp/25647-understanding-ppp-chap.html