You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Most reliable test for screening of diabetes mellitus- and explain in detail?
"The best screening test for diabetes, the fasting plasma glucose (FPG), is also a component of diagnostic testing" ___ diabetesjournals.org

The fasting plasma glucose test and the 75g oral glucose tolerance test (GTT) are both suitable tests for screening of diabetes.
However, the FPG test is preferred in clinical settings because it is easier and faster to perform, more convenient and acceptable to patients, and less expensive.

"Fasting plasma glucose level is the most reliable and convenient test" Problem oriented patient management