Which two key and block sizes are valid for AES? (Choose two.)

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Which two key and block sizes are valid for AES? (Choose two.)

A. 64-bit block size, 112-bit key length

B. 64-bit block size, 168-bit key length

C. 128-bit block size, 192-bit key length

D. 128-bit block size, 256-bit key length

E. 192-bit block size, 256-bit key length

Answer: CD

Explanation:

https://en.wikipediA.org/wiki/Advanced_Encryption_Standard