The compounds P, Q, and S were separately subjected to nitration using HNO₃/H₂SO₄ mixture. The major product formed in each case respectively is:
a) P - Nitrobenzene, Q - Toluene, S - Nitroethane
b) P - Toluene, Q - Nitrobenzene, S - Nitroethane
c) P - Nitroethane, Q - Nitrobenzene, S - Toluene
d) P - Nitroethane, Q - Toluene, S - Nitrobenzene