If the ortho-centre of a triangle \( A B C \) is \( B \), then which of the following is true? (...

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If the ortho-centre of a triangle \( A B C \) is \( B \), then which of the following is true?
(a) \( A C^{2}=A B^{2}+B C^{2} \)
(b) \( A C^{2}A B^{2}+B C^{2} \)
(c) \( A C^{2}A B^{2}+B C^{2} \)
(d) None of these
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