Commercial cork is obtained from the species of
1). Berberis
2). Quercus
3). Salix
4). Betula
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1. How many bones are there in a human body?
2. What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ?
3. The main constituent of biogas is
5. An inert gas mixed with oxygen given to patients suffering from restricted breathing is
7. When an iron nail gets rusted, iron oxide is formed
8. Which colour is the complementary colour of yellow ?