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ফিটকিরির সংকেত কোনটি?

K_{2} S O_{4} A l_{2} (S O_{4})_{3} . 24 H_{2} O

K_{2} S O_{4} A l_{2} (S O_{4})_{3} . 23 H_{2} O

K_{2} S O_{4} A l C_{3} . 24 H_{2} O

K_{2} S O_{4} A l C_{3} . 23 H_{2} O

ANS : 1

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