The reaction of Q with PhSNa yields an organic compound (major product) that gives positive Carius test on treatment with Na₂O₂ followed by addition of BaCl₂. The correct option(s) for Q is (are)

Aniline reacts with mixed acid (conc. $$HN{O_3}$$ and conc. $${H_2}S{O_4}$$) at $$288$$ $$K$$ to give P $$\left( {51\% } \right),$$ Q $$\left( {47\% } \right)$$ and R $$\left( {2\% } \right).$$ The major product(s) of the following reaction sequence is (are)

The product(s) of the following reaction sequence is (are)

In the following reactions, the major product W is