निम्नलिखित में कौन सा एक प� – McqOptions

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1.	निम्नलिखित में कौन सा एक पदार्थ प्राकृतिक बहुलक है -
A.	बैकेलाइट
B.	रेशम
C.	केवलार
D.	लेक्सान
Answer» C. केवलार

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