Which is the major state producing Basmati rice in India?

The concept of chemical evolution is based on

For better survival of the human population,which of the following steps is most important?

$Fe$ is made passive by

The ratio of the magnetic field at the centre of a current-carrying circular wire and the magnetic field at the centre of a square coil made from the same length of wire will be

If $f(x) = \begin{cases} \frac{x-1}{2x^2-7x+5}, & \text{for } x \neq 1 \\ -\frac{1}{3}, & \text{for } x=1 \end{cases}$, then $f'(1)$ is equal to: