Matching 2 Columns On One Worksheet With 2 Columns On Another?

i need to match 2 columns on one worksheet with 2 columns on another.

One column is alphanumerical (Reference Numbers), the other is company names.

I need to ensure that both the Reference and Company name match from one sheet, with the company and reference from another.

e.g if A1 and B1 on Wks 1 = A1 and B1 on Wks 2 = TRUE, anything else is FALSE.

There is likely to be Reference number and Comapny name duplicates, therefore the trick is to ensure that the number of duplicates match?(I.E ABC Company, Reference number 1234 may appear 5 times on worksheet 1, however if it is only on Worksheet 2 4 times, then this must be flagged).