Which of the following comprises an abbreviated crossmatch?

An abbreviated crossmatch is designed to ensure compatibility between a donor's blood and a recipient's blood while expediting the process, particularly when an immediate transfusion is necessary. The correct answer encompasses the critical components required for this process.

In an abbreviated crossmatch, the initial steps include confirming the patient's blood type (ABO and Rh) and screening for antibodies that the patient may have developed against donor blood. This is crucial to ensure that there is no unexpected immune response during the transfusion. The addition of an immediate spin (IS) crossmatch allows for a quick assessment of compatibility, focusing primarily on significant ABO incompatibilities and minor factors.

The other options either lack essential components or do not fully encapsulate the abbreviated crossmatch definition. For instance, "Type and screen" includes blood typing and antibody screening, but it does not specify the crossmatching step needed for immediate transfusion compatibility. Thus, the comprehensive answer that includes all necessary aspects for the abbreviated crossmatch, particularly the IS crossmatch, is indeed the most appropriate choice.