Which of the following does not give Friedel-Crafts reaction?

$p-$Nitrotoluene on further nitration gives :

In which of the following molecules does electrophilic attack occur at the meta position?

Arrange the following groups in increasing order of reactivity towards electrophilic nitration reaction: $C_6H_6, C_6H_5Cl, C_6H_5COOH, C_6H_5NH_2$.

The product $(R)$ in the following synthetic scheme is

The chemicals used for preparing acetophenone via Friedel-Crafts acylation are:
$(A)$ $C_6H_6$
$(B)$ $CH_3COCH_3$
$(C)$ $CH_3COCl$
$(D)$ Anhydrous $AlCl_3$