If the differential amplifier gives a negative output then it infers which of the following (Reference output is given to the positive terminal and sample output is given to the negative terminal)?

• A. Concentration of silica in sample and reference solution is equal
• B. Concentration of silica in reference solution is more than that in the sample solution
• C. Concentration of silica in sample solution is more than that in the reference solution
• D. Further processing is required to come to any conclusion