The electric potential \[V\] at any point O (x, y, z all in metres) in space is given by \[V=4{{x}^{2}}\,volt\]. The electric field at the point \[(1m,\,0,\,2m)\] in \[volt/metre\] is [IIT 1992; RPET 1999; MP PMT 2001]

• A.                    8 along negative \[X-\]axis
• B.                    8 along positive \[X-\]axis
• C.                    16 along negative \[X-\]axis
• D.                    16 along positive \[Z-\]axis