With 10 V dc connected at port A, the current drawn by 7 connected at port B is 

(A) 3/7 A 

(B) 5/7 A 

(C) 1 A 

(D) 9/7 A

(E) None of the above

With 10 V de connected at port A in the linear nonreciprocal two port network shown below, the following were observed: (i) 12 connected at port B draws a current of 3 A (ii) 2.52 connected at port B draws a current of 2A (iii) +] B.