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Algebra Difficulty 2.0 Junior Find the answer United Kingdom

Four numbers $a, b, c, d$ are such that $a + 5 = b^2 - 1 = c^2 + 3 = d - 4$ . Which of them is the largest?

(A) $a$ (B) $b$ (C) $c$ (D) $d$ (E) more information required

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