निम्नलिखित में सर्वाधिक क� – McqOptions

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1.	निम्नलिखित में सर्वाधिक कठोर तत्व कौन सा है -
A.	हीरा
B.	सीसा
C.	प्लेटिनम
D.	टंगस्टन
Answer» B. सीसा

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