Question: The p-nitrobenzoic acid is: 
 Options:  <1> Less acid than benzoic acid. <2> Less acid than p-methoxybenzoic acid. <3> More acid than benzoic acid and with lower pKa. <4> More acid than benzoic acid and with higher pKa. <5> Less acid than p-methoxybenzoic acid and with lower pKa.
3