Select multiple minimum values

I want to show the loans which are borrowed the least. This is a case where two loans are tied in the smallest number of borrowers.

Loan:
no | type    
------------
L1 | house  
L2 | student
L3 | car    

Borrower ('num' is foreign key to 'no'):
name | num
----------
A    | L1
A    | L1
A    | L2
A    | L3

SELECT loan.type
FROM loan, borrower
WHERE loan.no = b.num
  AND loan.type = (SELECT MIN(type) from loan)
  GROUP BY loan.type

This should produce student and car but for now it's just giving me one of them. How should I modify my query to solve this?