This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Increased sweat chloride is seen in all except – 
Select and explain. 
A. Ectodermal dysplasia, B. Nephrogenic diabetes insipidus, C. Glucose 6 phosphatase deficiency, D. Obesity
D: Obesity
Answer: D: Obesity 
Explanation: Increased sweat chloride is seen in -

Cystic fibrosis                                                                                                                      
Malnutrition                                                                                                                        
Pancreatitis                                                                                                                           
Hypothyroidism
Familial cholestasis
Ectodermal dysplasia
Fucosidosis
Mucopolysaccharidosis  
Untreated adrenal insufficiency (Addison disease)
Hereditary nephrogenic diabetes insipidus 
Hypoparathyroidism
Glucose-6-phosphatase deficiency