railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Chemistry Organic Chemistry

खालीलपैकी कोणते कृत्रिम रेशीम म्हणून ओळखले जाते?

1
ऍक्रेलिक
2
नायलॉन
3
पॉलिस्टर
4
रेयॉन
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