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UPPSC Prelims 2020GS-IQ. 109 of 221
Q. 1091 markMedium
UPPSC Prelims 2020·GS-I
Which one of the following substances is NOT synthetic? (a) Fibroin (b) Lexan (c) Neoprene (d) Teflon
(a)Fibroin
(b)Lexan
(c)Neoprene
(d)Teflon
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Which one of the following substances is NOT synthetic? (a) Fibroin (b) Lexan (c) Neoprene (d) Teflon