railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry Organic Chemistry

पॉलीएक्रिलोनिट्राइलचे व्यावसायिक नाव ______________ आहे.

1
डॅक्रोन
2
ऑर्लन (ऍक्रिलन)
3
PVC 
4
बॅकेलाइट
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