In given RC circuit, capacitance of capacitor \[{{C}_{1}}=3\mu F\]and \[{{C}_{2}}=1\mu F\]. It is given that time constant of circuit between A and B is 3 millisecond. Value of R will be

• A. \[1\,\Omega \]
• B. \[10\,\Omega \]
• C. \[100\,\Omega \]
• D. \[1000\,\Omega \]