किस तत्व की परमाणु संख्या 31 – McqOptions

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1.	किस तत्व की परमाणु संख्या 31 है -
A.	बोरोन
B.	अल्यूमिनियम
C.	गैलियम
D.	इन्डियस
Answer» D. इन्डियस

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