the electric potential existing in space is V(x,y,z)=A(xy+yz+zx).(A) Write the dimension of A(B)expression for electric field

Dear , I have answer of 1st part only. The dimensions of A will be of same as of electric field. Because as we know that V=E.r Here xy, yz, xz all are lengths and represents r. So here we can get dimension of A. I hope it will help you . With best wishes of your future. Thanx.