Step 1: Work out who Rohit's parents are, starting with the mother.
Sheela is the mother-in-law of Amruta, and Amruta is the sister-in-law of Rohit. A woman becomes someone's sister-in-law by marrying that person's brother, so Amruta is married to Rohit's brother, which makes Sheela, Amruta's mother-in-law, the mother of that brother, and so the mother of Rohit too, since they share the same mother.
Step 2: Confirm the brothers in the family.
Rahul is Ajey's father, and Ajey is Rohit's brother, so Rahul is also placed as a father figure for Rohit's side of the family. Ranveer is Rahul's only brother.
Step 3: Use the father-in-law clue to fix Rohit's father.
Ranveer is the father-in-law of Gauri, and Gauri is married to Rohit. A father-in-law is the father of your spouse, so Ranveer is the father of Rohit.
Step 4: Put Rohit's parents together.
Sheela is Rohit's mother (Step 1) and Ranveer is Rohit's father (Step 3), so Sheela and Ranveer are Rohit's parents together, meaning Sheela is Ranveer's wife.
Step 5: Match this to the options.
Wife is not listed among cousin, mother or sister, so none of the given options describe the relation correctly.
Final Answer:
Option D, none of the above, since Sheela is actually Ranveer's wife.