What is the disease name of the patient who has the highest level of triglyceride within the normal range?
disease name referse to Diagnosis; highest level of triglyceride within the normal range refers to MAX(TG < 200);
SELECT T1.Diagnosis FROM Examination AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID WHERE T2.TG < 200 ORDER BY T2.TG DESC LIMIT 1