Blood Relations – Questions & Solutions for CSAT

UPSC conducts the civil services exam in three stages- Prelims, Mains, and interview. The preliminary exam is the first screening stage which decides the fate of an aspirant. The Prelims consist of two papers:

  1. General Studies Paper I
  2. General Studies Paper II( CSAT)

The General Studies Paper I deal with Polity, Economy, Geography, History, and General science and currents affairs. The General Studies Paper II (CSAT) deals with aptitude and English comprehension.

Must Read | Crack General Studies Paper II (CSAT) 

The questions from blood relations are asked in CSAT paper. Here we are giving the details about basic relationships which often figure in the questions. If aspirants are familiar with the given articles in the table below, half of the battle is already won. It is not obligatory to mug-up these names, but aspirants should make a clear picture in your mind as you go through each one of them. This will help you to formulate the shortcut tricks for solving Blood relations problems for logical and analytical reasoning.

To develop a blood relation graphic, some standard symbols are used according to aspirants convenient to specify the relationships among the family members.



Husband of Mother or Mother’s husband


Wife of father or Father’s Wife


Father or Mother’s Son


Father or Mother’s Daughter


Father or Mother’s Brother


Father or Mother’s Sister


Father’s or Mother’s Father


Father of Father or Mother

Great Grandfather

Father of Grandfather or Grandmother


Mother of Father or Mother


Father or Mother’s Mother

Great Grandmother

Mother of Grandfather or Grandmother


Husband’s sister or Wife’s Sister


Son’s Wife


Brother’s or Sister’s Son


Brother’s or sister’s Daughter


Aunt’s or Uncle’s Son or Daughter


Sister’s Husband


Brother’s Wife

Father or Uncle

Grandfather’s or Grandmother’s Son


Uncle’s Wife


Daughter’s Husband


Practice question on blood relation

  1. Pointing towards Appu, Vinu said “I am the only son of his father’s one of the sons.”  How Appu is related to Vinu?
    1. Nephew
    2. Uncle
    3. Either uncle or father
    4. Father

Answer: C

  1. Pointing to a girl in the photograph, Suraj said, “Her mother`s brother is the only son of my mother’s father.” How is the girl`s mother related to Suraj?
  2. Mother
  3. Sister
  4. Aunt
  5. Grandmother

Answer: C

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