[4]Choose the correct answer from the each of the following: 1. Normally Y bus matrix is a (A) null matrix (B) sparse matrix (C) full matrix (D) unit matrix 2. For n bus power system size of Y bus matrix is (A) (n-1)×(n-1) (B)(n-2)*(n-2) (C) nxn (D) (n-1)^(n-2)
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