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Which of the following chemicals is useful in photography?
A. Aluminium hydroxide
B. Potassium nitrate
C. Silver bromide
D. Sodium chloride

C. Silver bromide

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Which of the following acts as a resistance against in the body? A. Carbohydrates B. Red corpuscles C. Vitamins D. White corpuscles	Which are the important meeting of the Commonwealth? A. Biennial meeting of the Commonwealth Heads of Government (CHOGM) B. Annual meeting of the finance minister of the member countries C. Regular meeting of the minister of education, law, health and other minister D. All of the above