Which is the best method for the conservation of wild relatives of plants?

$A$ satellite is revolving very close to a planet of density $\rho$. The period of revolution of the satellite is

In $DNA$,the two polynucleotide chains are ...

Which of the following is the superoxide of potassium?

In the circuit shown in the figure,$K_1$ is open. The charge on capacitor $C$ in steady state is $q_1$. Now,the key is closed and at steady state,the charge on $C$ is $q_2$. The ratio of charges $q_1/q_2$ is

If the pair of lines $ax^2 + 2(a + b)xy + by^2 = 0$ represent the diameters of a circle and divide the circle into four sectors such that the area of one sector is three times the area of the other,then: