Science, asked by yusafkhan2167, 3 months ago

13. ਹੁਣ ਤੱਕ ਜਾਣੇ ਜਾਂਦੇ ਪਦਾਰਥਾਂ ਵਿੱਚ ਸਭ ਤੋਂ ਸਖਤ
ਪਦਾਰਥ ਕਿਹੜਾ ਹੈ ?
(ਉ) ਗਰੇਫਾਈਟ
(ਅ) ਲੋਹਾ
(ਏ) ਤਾਂਬਾ
(ਸ) ਹੀਰਾ

Answers

Answered by ttaniya247

0

Explanation:

ਹੀਰਾ is the hardest matter

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