What size block does AES work on?

What size block does AES work on?
A . 64
B. 128
C. 192
D. 256

View Answer

Answer: B

Explanation:

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

Rijndael is a family of ciphers with different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths: 128, 192 and 256 bits.