*$_Vetrocoke solution is?

• A. A mixture of K‚Äö√á√áCO‚Äö√á√â and As‚Äö√á√áO‚Äö√á√â
• B. K‚Äö√á√áSO‚Äö√á√ë
• C. A mixture of Na‚Äö√á√áCO‚Äö√á√â and As‚Äö√á√áO‚Äö√á√â
• D. Na‚Äö√á√áSO‚Äö√á√ë