This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Pubey, Subject name: Pediatrics
A child with decreased levels of LH, FSH and Testosterone presents with delayed pubey. Which of the following is the most likely diagnosis: 
Select and explain. 
A. Klinfelter's syndrome, B. Kallman's syndrome, C. Androgen Insensitivity syndrome, D. Testicular Infection
B: Kallman's syndrome
Answer: B: Kallman's syndrome 
Explanation: - Among the given options, only Kallman syndrome is a cause of hypogonadotrophic hypogonadism, where LH, FSH, as well as testosterone levels will be low. - Associated with impaired sensation of smell - Remaining all options given, presents with hypergonadotropic hypogonadism