Q. With reference to Marker X syndrome, consider the following statements:
1. It is a genetic disorder.
2. Boys often have a more serious form of this syndrome than girls.
3. The disorder can be cured if therapy is given at an early stage.
Which of the statements given above is/are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: A
Notes:
  • Statement 1 is correctFragile X syndrome (FXS) is a genetic disorder. It is also known as Martin-Bell syndrome or Marker X syndrome. 
  • Statement 2 is correctThe syndrome is the leading inherited cause of autism in 4% of the population worldwide. Boys often have a more serious form of it than girls. 
  • Statement 3 is incorrect: The disorder cannot be cured, but early therapy can improve the individual’s quality of life. 

Source: Article