<prompt> Lactose intolerance in a suspected patient is diagnosed by giving an oral load of lactose and measuring concentration of:CO2H2Onetwo carbon compoundsN2  <response>: b. H2 Ref: Nelsons 20e p 2870, Ghai 8e p 297Breath hydrogen tests can be used to determine a specific carbohydrate malabsorption.It can be used to diagnose bacterial overgrowth or lactosefructose malabsorption. 