How fast is private key cryptography compared to public key cryptography?

A.
10 to 100 times faster.

B.
100 to 1000 times faster.

C.
1000 to 10000 times faster.

D.
10000 to 20000 times faster.

Explanation:
Since Private Key encryption (Symmetric) only has one key for encrypt-decrypt, you
need to use an alternative way to pass the shared secret in a secure manner, in our days, it’s
usually done by telephone or some secure methods that not involve the channel you are trying to
secure. Also, since you need one different key to encrypt-decrypt every connection, the number of
keys gets huge in a little time, for example, if we have 10 users trying to communicate between
themselves, we have 100 different encryption keys to manage. There is an advantage for Private
key encryption, the encryption is very fast, about 1000 / 10000 times faster than asymmetric
encryption.