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T.S.P এর সংকেত কোনটি?

3 C a_{3} (P O_{4})_{2}

C a_{3} (P O_{4})_{2}

C a_{3} (H_{3} P O_{4})_{2}

3 C a_{3} (H_{2} P O_{4})_{2}

ANSWER : 4

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