बिजली का सुचालक कौन सा नहीं है? A. पोर्सेलेन B. एल्युमिनियम C. टंगस्टन D. निकेल

Aluminium, tungsten and nickel are metals and conduct electricity well. Porcelain is a ceramic insulator, which is why it is used to hold electric wires on poles and in switch bodies.