Which one of the following is an electric conductor ?

Materials are classified as conductors or insulators based on their ability to allow electric current to flow. Plastic and wood are explicitly identified as insulators or poor conductors [3]. While water can conduct electricity due to dissolved salts, distilled water is highly purified and acts as a poor conductor or insulator because it lacks the necessary ions for significant conduction [1]. In contrast, the human body is a conductor of electricity. This is evidenced by the fact that electricians must wear rubber gloves or use plastic-covered tools to protect themselves from electric shocks, as the human body allows current to pass through it [2]. The presence of electrolytes and water in human tissues facilitates this conductivity, making it the only viable conductor among the given options.

Sources

1. [2] Science-Class VII . NCERT(Revised ed 2025) > Chapter 3: Electricity: Circuits and their Components > 3.2 A Simple Electrical Circuit > p. 36
2. [3] https://ncert.nic.in/textbook/pdf/hesc111.pdf
3. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 4: The World of Metals and Non-metals > 4.1.5 Conduction of electricity > p. 48