This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2017, Subject name: Pediatrics
Dried blood spotes test in neonates is used in testing for:- 
Select and explain. 
A. Inborn error of metabolism, B. Blood group, C. Total cell count, D. Creatinine and bilirubin
A: Inborn error of metabolism
Answer: A: Inborn error of metabolism 
Explanation: Dried blood spots are used in Tandem Mass Spectrometry as screening test for inborn errors of metabolism. Another screening test used- GCMS gas chromatography mass spectroscopy.