Which of the following statements is/are incorrect ?

Which of the following statements is/are incorrect ?
A) Twig is the dual element of Link.
B) Flux Linkage is the dual element of Charge & Mesh.
C) Current source is the dual element of Voltage Source & vice-versa.
D) Twig & Node are the dual elements of Link & Mesh respectively.

a. Both (B) & (C)
b. Only (A)
c. Both C & D
d. Only (B)

Correct Answer : d. Only (B)

Explanation :

Flux Linkage is the characteristic dual element of only charge and not of mesh. In fact,mesh has its own dual element in the form of node. Hence, the remaining statements except (B) are all precise & the exact combinational pairs of each other.