Which of the following is the correct order for the calorific value of nutrients?

The first viral disease detected in human beings was:

Identify the correct set of stereochemical relationships amongst the following monosaccharides $(I)-(IV)$:

Food preservative sodium benzoate is eliminated from the body as which of the following metabolite?

Assertion : $Mg$ is not present in the enamel of human teeth.
Reason : $Mg$ is an essential element for the biological functions of humans.

Which of the following statements are correct?
a) In maltose,$C-1$ of one $\alpha-D$-glucose is linked to $C-4$ of second $\alpha-D$-glucose.
b) Quaternary structure of protein represents spatial arrangement of two or more polypeptide chains with respect to each other.
c) Nucleotide units in a nucleic acid are joined to each other through a phosphodiester linkage.
d) Abnormally low level of thyroxine leads to hypothyroidism.