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

पॉलीएक्रिलोनिट्राइल का व्यावसायिक नाम ______________ है।

1
डैक्रॉन
2
ऑरलॉन (एक्रिलान)
3
PVC 
4
बैकेलाइट
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