Muhammad bin Tughlaq's experiment of introducing token currency could not succeed on account of

Which of the following statements regarding oxidation and reduction are correct?

1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place
2. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place
3. Oxidising agent decreases the oxidation number but reducing agent increases the oxidation number
4. Oxidising agent increases the oxidation number but reducing agent reduces the oxidation number

Select the correct answer using the code given below:

Carbohydrates are stored in plants and animals in the form of

Sickle-cell anaemia is a disease caused due to the abnormality in?

What are cold-blooded animals?

Which one among the following statements is correct?