The correct option is
A ![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1294074/original_a11.png)
In nucleophilic aromatic substitution, the negative charge of the meisenheimer complex is stabilised by
−M effect of
−NO2 group only if it present at the ortho or para position of the leaving group (halogens).
Hence, the nucleophile will attack the
−Cl at para position and is replace by the
−SH group.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1295562/original_b7.png)