A patient with chronic kidney disease on hemodialysis develops severe muscle cramps and weakness. ECG shows prolonged QT interval. Which electrolyte abnormality is MOST likely responsible for these findings?

A patient presents with persistent cough, fever, and night sweats. A chest X-ray reveals granulomas. Which of the following is the most likely diagnosis?

A doctor, while operating on an HIV^+ patient accidently cut himself with a scalpel. He comes to you, suspecting himself to have contacted the virus. Which test will you advise him to rule out/confirm his suspicion?

A patient experiences severe chest pain radiating to the left arm. Which diagnostic test is most crucial to confirm a suspected myocardial infarction?

Application of PCR are

I. detection of pathogens

II. diagnosis of specific mutation

III. DNA fingerprinting

Choose the correct option