Final answer:
The result of a 3-way join query typically includes combined data from the involved tables, likely patient personal information and disease descriptions. A 3-way join uses the SQL JOIN operation based on shared foreign keys. Option 4) 'patientid, fname, lname, disease_desc' likely represents the result of such a query.
Step-by-step explanation:
The result of a 3-way join query depends on the structure and relationships between the tables involved in the query. However, based on the options provided, the most likely result would be a combination of data from all the entities mentioned, which often includes patient information, disease description, and any connecting attributes such as their respective IDs. A 3-way join, in a database, is used to combine information from three different tables. This is typically done using the SQL JOIN operation on shared attributes that the tables have in common, called foreign keys.
If one was to assume the tables being joined are 'Patients', 'Diseases', and a junction table (like 'PatientDiseases') that links these two by their IDs, and the desired information includes both patient personal information and disease descriptions, then the likely result of the 3-way join would be option 4) patientid, fname, lname, disease_desc, which encompasses all the desired attributes from both the patient information and the disease descriptions.