Final answer:
The correct secondary diagnosis code assigned to the mother who has delivered live twins is Z37.2 (option A), according to the ICD-10 classification system.
Step-by-step explanation:
The diagnosis code assigned to the record of a mother who has delivered live twins is Z37.2, which is the code listed in the ICD-10 (International Classification of Diseases, Tenth Revision) for twins, both liveborn. The ICD-10 is employed to code and classify mortality data from death certificates and morbidity data from inpatient and outpatient records, including physician's offices.
The correct answer to the question is:
A. Z37.2
This specific code is used to indicate the number of infants born and the outcome of the birth on the mother's medical record.