Ishaan tested the nature of a few common substances with different indicators and recorded his observations as follows :Substance P turned methyl orange yellow.Substance Q turned phenolphthalein colorless.Substance R did not have any effect on blue or red litmus.Substance S turned China rose indicator green.P, Q, R and S could be respectively

• A. Lemon juice, fermented milk, salt solution and milk of magnesia.    
• B. Sugar solution, vinegar, water and curd.
• C. Lime water, apple juice, sugar solution and saliva   
• D. None of these.