If the differential amplifier gives zero as 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