Chris, a security architect, has decided to adopt public key infrastructure $($PKI$)$ for a more formal approach to securely handling keys in a medium$-$sized organization. Chris's system will initiate a connection to a target system. During the PKI process, which of the following allows Chris's system to get the target's public key?

Question $20$ options:

Public key of a trusted entity

Private key of trusted entity

Public key of a registration authority

Private key of trusted target