The letter ‚Äö√Ñ√∂‚à ö√ë‚à ö‚â§m‚Äö√Ñ√∂‚à ö√ë‚à ö¬• marked on the tallies refers to _____$

• A. Metre
• B. Metric chain
• C. Non Metric chain
• D. Mild steel