Distinct values

Am trying to list distinct values in a column from a column of another sheet.
ColA Col B
A 3
B 4
B 4
C 5
A 3
C 5
B 4

Always A, b and C are having same values for Col B

am trying to get the below output:

A 3
B 4
C 5

I used If and COuntif, but not possible. Can somebody help me