Predict the major product for the following reaction.

Question

Quizplus · Accepted Answer

The reaction is an electrophilic aromatic substitution reaction with nitration reagents (concentrated HNO3 and concentrated H2SO4) on the aromatic ring of the starting compound. 
The nitration reaction usually leads to the substitution of one hydrogen atom on the ring for a nitro group (-NO2). 
In the case of the starting compound, the nitro group can only replace one of the ortho positions of the methyl substituent, because the other two positions are blocked by the methyl group.
Therefore, the major product is I, which is the nitration product at the ortho position of the methyl group.

Predict the Major Product for the Following Reaction