A charged oil drop is suspended in a uniform field of \[3\times {{10}^{4}}V/m\] so that it neither falls nor rises. The charge on the drop will be (take the mass of the charge as \[9.9\times {{10}^{-15}}kg\,and\,g\,as\,10m/{{s}^{2}}\]

• A. \[3.3\times {{10}^{-18}}C\]     
• B. \[3.2\times {{10}^{-18}}C\]
• C. \[1.6\times {{10}^{-18}}C\]     
• D. \[4.8\times {{10}^{-18}}C\]