What is obtained when benzene reacts with fuming nitric acid?

For the following Friedel-Crafts alkylation reaction, which of the statements are correct?
$A$. Major product is n-propyl benzene.
$B$. iso-propyl carbocation intermediate is also generated.
$C$. Multiple substitution is inevitable.
$D$. Introducing electron-donating substituent on benzene will not produce any alkyl benzene.

In the sulphonation,acetylation and formylation of benzene,the group of effective electrophiles would be:

Which of the following groups increases the reactivity of electrophilic aromatic substitution?

Decide the correct order of reactivity of the following compounds towards electrophilic aromatic substitution (halogenation) with $(Cl_2 + AlCl_3)$:
$I$: Phenyl benzoate $(C_6H_5COOC_6H_5)$
$II$: Toluene $(C_6H_5CH_3)$
$III$: Ethylbenzene $(C_6H_5CH_2CH_3)$
$IV$: Benzene $(C_6H_6)$

Arrange the following in increasing order of reactivity towards nitration:
$A$. $p$-xylene
$B$. bromobenzene
$C$. mesitylene
$D$. nitrobenzene
$E$. benzene
Choose the correct answer from the options given below.