12. Let

 Classify matrices A, B, C, and D according to the categories: (1) Positive Definite, (2) Negative Definite, (3) Positive Semi-Defnite, (4) Negative Semi-Defite. Which of the following gives the correct order of matrices from category (1) to (4)?
(A) BACD
(B) ADCB
(C) ADBC
(D) DABC

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