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In the solution of load flow equation, Newton Raphson (NR) method is superior to the GaussSeidal (GS) Method, because the: 

(A) Convergence characteristic of the NR methods are not affected by selection of slack bus (B) Number of iterations required in the NR method is not independent of the size of the system (C) Time taken to perform one iteration in the NR method is less when compared to the GS method (D) Number of iteration required in the NR method is more than compared to that in the GS method 

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