With the conventional notation \[\mathop {\rm{X}}\limits^ \cdot \] = AX + BU for the state description of a liner time-invariant network, examine the validity of the following statements relating to the matrix A:
1. A is symmetrical if the network is reciprocal.
2. The sum of the natural frequencies of the network is equal to the determinant of A.
Which of these statements is/are true?
A. Both 1 and 2
B. 1 only
C. 2 only
D. Neither 1 nor 2
Answer: Option B
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