How many chiral carbons are there in Reserpine (an antipsychotic drug)?

Identify the correct sequence for True and False.
$(I)$ Only compounds with chiral centers can be optically active.
$(II)$ Absence of elements of symmetry is the reason for a molecule's optical activity.
$(III)$ All organic compounds contain carbon $\&$ hydrogen.
$(IV)$ Different canonical forms of a molecule represent the actual structures of a molecule which has resonance in it.

Identify the $R$ configuration.

The number of all the possible stereoisomers formed by the given compound is

Which one of the following pairs represents stereoisomerism?

The most stable conformation of the following compound is