Which pyrimidine bases are present in $DNA$?

$A$ transformer works on the principle of

What are the products obtained when ammonia is reacted with excess chlorine?

In the $CGS$ system,the magnitude of the force is $100 \text{ dynes}$. In another system where the fundamental physical quantities are kilogram,meter,and minute,the magnitude of the force is:

$\int \frac{dx}{\sqrt{x}(x+9)}$ is equal to

In any $\triangle ABC$,$r_1 r_2 + r_2 r_3 + r_3 r_1$ is equal to