$d$-tartaric acid and $meso$-tartaric acid are

The total number of chiral molecules formed from one molecule of $P$ on complete ozonolysis $(O_3, Zn / H_2O)$ is. . . . . . .

Which one of the following exhibits enantiomerism?

Solutions of optically active isomers rotate the plane of polarized light in a polarimeter. Match the following columns $(I)$ with $(II), (III)$,and $(IV)$ correctly:

$(I)$ Optical Activity	$(II)$ Form	$(III)$ Sign	$(IV)$ Rotation
$(A)$ Dextrorotatory	$d$	$(+)$	Right
$(B)$ Laevorotatory	$l$	$(-)$	Left
$(C)$ Optically Inactive (Racemic)	$dl$	$(\pm)$	Zero rotation

Identify the compound which rotates the plane-polarized light.

The total number of stereoisomers that can exist for $M$ is:
$M$ is a bicyclic ketone with a methyl group at the bridgehead and two methyl groups at the bridge carbon.