An archaeologist analyses the wood in a prehistoric structure and finds that \[{{C}^{14}}\](Half-life = 5700 years) to \[{{C}^{12}}\]is only one- fourth of that found in the cells buried plants. The age of the wood is about [NCERT 1982]

• A.            5700 years                             
• B.            2850 years
• C.            11,400 years                         
• D.            22,800 years