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Shivam • 8.86K Points
Tutor III Science
416

Q. कार्बन का कौन-सा अपरूप अधिक कठोर होता है ?

(A) ग्रेफाइट
(B) हीरा
(C) कोयला
(D) काजल
Correct Answer - Option (B)

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