The relative stabilites of the following carbocations is:

Which of the following represents the true order of bond dissociation energy of the indicated $\mathrm{C}-\mathrm{H}$ bond of the following molecules?

The order of decreasing stability is:

The most carbocations, carbanions, free radicals and radical cations are reactive carbon intermediates.

Their hybrid orbitals respectively are:

Which of the following structure is aromatic?

How many hyperconjugative structures are possible in the following carbocation?

Which of the following compound(s) is/are an aromatic compounds?

$\left(\mathrm{i}\right)$ 

$\left(\mathrm{ii}\right)$ 

$\left(\mathrm{iii}\right)$ 

$\left(\mathrm{iv}\right)$