What is the preferred way of encryption?

What is the preferred way of encryption? Correct Answer public key-encryption

Pre Shared key can be compromised and either party can be suspected. Likewise KDC or symmetric key can have breach which are undesirable. Public and private key encryption is a known industry standard.

Related Questions

In RSA 1. p and q are chosen as very large prime number 2. Compute n = p * q and ϕ(n) = (p-1) * (q-1) Later e encryption key chosen. How this encryption key is selected?
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Public key encryption/decryption is not preferred because