The property by virtue of which a compound can rotate the plane of plane-polarized light is known as:

Which of the following compounds will exhibit a meso form?

An aqueous solution containing compounds $A$ and $B$ shows optical activity. $A$ and $B$ are stereoisomers. Which of the following possibilities cannot be correct?

Which of the following compounds does $NOT$ exhibit optical isomerism?

Rotation of plane polarised light is measured by

Which of the following is optically active?