T.N.T. is chemically known as:

The correct answer is Option (2) → 2,4,6-trinitrotoluene

T.N.T. (an explosive) is made by the nitration of toluene with a mixture of concentrated nitric and sulphuric acids. The \( \ce{CH3} \) group is ortho and para directing, so the three nitro groups enter positions 2, 4 and 6 of the ring (\( \ce{CH3} \) at position 1):

    \( \ce{C6H5CH3 + 3HNO3} \xrightarrow[\Delta]{\text{conc. }\ce{H2SO4}} \ce{(NO2)3C6H2CH3 + 3H2O} \)

Its chemical name, which fixes the positions of the groups, is 2,4,6-trinitrotoluene. The name “trinitrotoluene” alone does not say where the nitro groups are; only the 2,4,6-isomer is T.N.T.