Final answer:
The blood type that would indicate a need for an antibody (Indirect Coomb's) test is A negative.
Step-by-step explanation:
The blood type that would indicate a need for an antibody (Indirect Coomb's) test is c. A negative.
The Indirect Coomb's test detects if a person has developed antibodies against red blood cell antigens. People with blood type A negative have A antigens on their red blood cells and may develop antibodies against the B antigen. Therefore, an Indirect Coomb's test would be necessary to check if these antibodies are present.
On the other hand, blood types O negative, AB positive, and B positive would not indicate a need for an Indirect Coomb's test as they do not have the specific antigen-antibody interaction that requires this test.