Which air pollutant is responsible for the Bhopal gas tragedy?

Name the method of asexual reproduction in fungi.

$A$ coil of $n$ turns and resistance $R \ \Omega$ is connected in series with a resistance $R/2$. The combination is moved for time $t$ seconds through a magnetic flux change from $\phi_{1}$ to $\phi_{2}$. The induced current in the circuit is:

The number of ways that $8$ beads of different colours can be strung as a necklace is

$(b \times c) \times (c \times a) = $

Which is the best method to obtain virus-free plants through tissue culture?