Question

Which of the sets can be placed in a one-to-one correspondence?
a. {1,2,3,4,5} and {m,n,o,dd,ss}
b. {a,b,c,...,f} and {11,22,33,...,55}
c. {t | t is a letter in the word cancan} and {1,2,3,4}
d. None of the above