Answer: Sister

Explanation:
My son's sister is my daughter. My daughter's husband is my son-in-law

Answer: Cousin      

Explanation:
P's mother's mother's son is P's uncle. P's uncle's daughter is P's cousin.

Answer: Grandmother   

Explanation:
My grandmother's only child is my mother. My Mother's husband is my father. My father's mother is my grandmother.

Answer: Son

Explanation:
Ramu's mother-in-law's only daughter is Ramu's wife. Ramus wife son is Ramu's son.

Answer: Granddaughter

Explanation:
My son's son's mother is my son's wife. My son's wife's daughter is my granddaughter.

Answer: Sister 

Explanation:
Only son of woman's grandfather — Woman's father; Man's brother's father —Man's father.
So. man's father is woman's father i.e. woman is the man's sister. 

Answer: Brother-in-law 

Explanation:
Anju’s daughter's mother —Anuj's wife; Anufs wife's father — Anufs father-in-law;
Father-in-law's son — Anuj's brother-in-law, So, Manish is Anuls brother-in-law. 

Answer: Nephew 

Explanation:
Father of Shilpa's son Shilpa's husband.
So, Kapil is the son of sister of Shilpa's husband. Thus, Kapil is Shilpa's nephew. 

Answer: Cousin

Explanation:
Brother of uncle's daughter — Uncle's son — Cousin.
So, the man is Saroj's cousin.

Answer: Aunt 

Explanation:
Only son of Amar's mother's father — Amar's maternal uncle.
So, the girl's maternal uncle is Amar's maternal uncle. Thus, the girl's mother is Amar's aunt. 

Answer: Daughter-in-law 

Explanation:
Arun's son's wife's daughter — Arun's son's daughter; Mother of daughter of Arun's son — Wife of Arun's son. So, Arun is the father-in-law of the lady.