What is the chemical name of Vitamin $D$?

Besides $C, H$,and $O$,which of the following elements is also present in organic molecules?

Maximum energy is required to break which of the following types of bonds?

Give a scientific reason: Although the molecular weight of lipids is less than $1000 \text{ Dalton}$,they are included in biomacromolecules.

Select the correct option for the following:
Biomolecules found in the acid-soluble pool $- P$
Biomolecules found in the acid-insoluble fraction $- Q$

Vitamins are