Which of the following is a class of $Bryophytes$?

Which of the following is an antidiabetic drug?

Which one of the following is not a micronutrient?

Find the equation of the pair of straight lines that bisect the angles between the lines represented by $ax^2 + 2hxy + by^2 = 0$.

Ammonia with excess of $Cl_2$ forms:

$A$ body cools from $62^{\circ}C$ to $50^{\circ}C$ in $10 \text{ minutes}$ and to $42^{\circ}C$ in the next $10 \text{ minutes}$. The temperature of the surroundings is ........ $^{\circ}C$.