A coil having an area \[{{A}_{0}}\] is placed in a magnetic field which changes from \[{{B}_{0}}\]to \[4{{B}_{0}}\] in a time interval t. The e.m.f. induced in the coil will be [MP PET 1990]

• A.            \[\frac{3{{A}_{0}}{{B}_{0}}}{t}\]                                      
• B.            \[\frac{4{{A}_{0}}{{B}_{0}}}{t}\]
• C.            \[\frac{3{{B}_{0}}}{{{A}_{0}}t}\]                                      
• D.            \[\frac{4{{B}_{0}}}{{{A}_{0}}t}\]