Aldehydes, Ketones and Carboxylic Acids

In the following reaction sequence, Q, R, S and T are the major products. [figure] The correct statement(s) about Q, R, S and T is(are)

1. S on warming with ammoniacal AgNO3 results in the formation of silver mirror.
2. Q on treatment with Cl2(excess)/UV gives gammaxane.
3. T is a heterocyclic compound.
4. R on acid catalyzed intramolecular cyclization followed by treatment with Zn-Hg/HCl gives 9,10-dihydroxyanthracene.