Which of the following is a latex-based alkaloid?

With a resistance of ' X ' in the left gap and a resistance of $9 \Omega$ in the right gap of meter bridge, the balance point is obtained at 40 cm from the left end. In what way and to which resistance $3 \Omega$ resistance be connected to obtained the balance at 50 cm from the left end?

Which of the following is $NOT$ a ketone body?

Which of the following absorbs light energy during photosynthesis?

If $y=\tan ^{-1}\left(\frac{\sqrt{1+a^2 x^2}-1}{a x}\right)$,then $\left(1+a^2 x^2\right) y^{\prime \prime}+2 a^2 x y^{\prime}$ is equal to

In which of the following are Chlorophyll-$a$,Chlorophyll-$d$,and Phycoerythrin found?