The matrix of any state-space equations for the transfer

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The matrix of any state-space equations for the transfer function C(s)/ R(s) of the system shown below in the figure is

1. -1 0
  0 -1
2. 0 1
  0 -1
3. [ -1 ]
4. [ 3 ]

Correct Option: C

From the figure X₁̇ = – X₁ + 3r (t)
The A matrix is [– 1].