सर आइजैक न्यूटन ने क्या आव� – McqOptions

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1.	सर आइजैक न्यूटन ने क्या आविष्कार किया था?
A.	टेलीस्कोप को दर्शाते हुए
B.	ठीक घड़ी
C.	माइक्रोस्कोप
D.	चश्मा
Answer» B. ठीक घड़ी

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