Assertion: D-glyceraldehyde is dextrorotatory.
Reason: All dextrorotatory compounds are said to have D-configuration.
A.Assertion and Reason are correct
B.Assertion is correct but Reason is false
C.Assertion is false but Reason is correct
D.Assertion and Reason is false

Hint: Configuration: It is defined as the orderly arrangement of the atoms or molecules of a compound which provides it certain set of properties. The configuration of the molecules is changeable property with the cleavage of bonds present between them.

Complete step by step answer:
Now we will study about glyceraldehyde and dextrorotatory compounds and we will find a relation between them.
Glyceraldehyde: It is a triose monosaccharide with compound equation \[{C_3}{H_6}{O_3}\]. It is the least difficult of every normal aldose which means it is the simplest form of aldose. The word originates from joining glycerol and aldehyde, as glyceraldehyde is glycerol with one $OH$ group oxidized to an aldehyde.

The Experiment to differentiate between dextrorotatory compounds and levorotatory compounds:
The Levi (l) and dextro (d) are the words used to separate between two kinds of arrangements. At a point when we pass an energized light from any source (the light which isn't dispersed just coordinated towards one heading) in response, the light either deflects towards right or follows the same path. On the other hand if the light deviates towards right, at this point it is dextrorotatory and if it redirects towards left, at this point it will be levorotatory.

Therefore,
Dextrorotatory compounds: These are the compounds that rotate the light toward right and have L-configuration.
Levorotatory compounds: These are the compounds that rotate the light towards the left and have D- configuration.
Thus, the correct option is B, since glyceraldehyde is a dextrorotatory directing the light towards right, and possesses L- configuration.

Hence, the correct option is (B).


Note: Glyceraldehyde is a colourless sweet glasslike strong with a mass of \[90.08{\text{ }}g{\text{ }}mo{l^{ - 1}}\]. The solvency in water is \[29{\text{ }}200{\text{ }}mg{\text{ }}{l^{ - 1}}\]. It is utilized in sustenance (nutrition); in the production of polyesters and glues; as a cellulose modifier; and in the tanning of calfskin.