Sunken stomata are found in the leaves of

Four convergent lenses have focal lengths $100 \, cm, 10 \, cm, 4 \, cm$ and $0.3 \, cm$. For a telescope with maximum possible magnification,we choose the lenses of focal lengths:

If $\lim _{x \rightarrow \infty}\left(\frac{x^2+x+1}{x+1}-ax-b\right)=4$,then

Fructose reduces Tollen's reagent due to

The number of solutions for the equation $x^2 - 5|x| + 6 = 0$ is

The current in an $LR$ circuit builds up to $\frac{3}{4}$ of its steady-state value in $4 \ s$. The time constant of this circuit is: