Answer 1) d
Rashmi is the daughter of Amit who is son of Veena.
Therefore, Veena is Grand mother of Rashmi.
Answer 2) b
Vandana's sister is Vishal's brother's wife.
Therfore, Vishal is Vandana's Brother-in-law.
Answer 3) c
Yashwanth is son of Avinash who is the son of Rohit Agarwal.
Therefore, surname of Yashwanth is Agarwal.