Final Answer:
The patient with a productive cough worsening over 4 weeks is likely suffering from a lower respiratory tract infection is, a) PNA, Appendicitis, UTI
Step-by-step explanation:
First Patient (Productive Cough): The patient with a productive cough worsening over 4 weeks is likely suffering from a lower respiratory tract infection. This aligns with PNA (Pneumonia).
Second Patient (Abdominal Discomfort, RLQ Tenderness): The symptoms of abdominal discomfort localizing to the right lower abdomen, accompanied by fever and RLQ tenderness on palpation, point towards appendicitis. Therefore, the second diagnosis is Appendicitis.
Third Patient (Urinary Symptoms, Positive Urine Dip): The presence of urinary symptoms, along with a positive urine dip for leukocytes and bacteria, is indicative of a urinary tract infection (UTI).
In summary, the most likely diagnoses for the three patients are Pneumonia (PNA), Appendicitis, and Urinary Tract Infection (UTI). Therefore, option (a) is correct.