4. The unit of mass of the disc is
A. Kg
B.Cm
C.gm-1
D. Cm-2
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Answer:
ᴄᴍ
Explanation:
ᴍᴀʀᴋ ᴍᴇ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ
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