<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 15-year-old male adolescent presents to the pediatrician with his parents complaining that he is shorter than his peers. His past medical history does not suggest any specific recurrent or chronic disease. There is no history of weight gain, weight loss, constipation, dry skin, headache. Both his parents are of normal height. On physical examination, he is a well-fed, well-developed male and his vital signs are within normal range. His physical examination is completely normal. His sexual development corresponds to Tanner stage 2. Analysis of his growth charts suggests that his height and weight at birth were within normal range. After the age of six months, his height and weight curves drifted further from average and approached the 5th percentile. An X-ray of the patients left hand reveals delayed bone age. Which of the following is the most likely cause of short stature in the boy?? A: Constitutional growth delay, B: Familial short stature, C: Congenital adrenal hyperplasia, D: Growth hormone deficiency, E: Hypothyroidism,  <response>: This is a question about a 15-year-old male adolescent with short stature. The key findings in the stem are:- Shorter than peers- No specific medical history or chronic diseases - Normal vital signs and physical exam- Tanner stage 2 sexual development - Normal height and weight at birth, then drifted to 5th percentile after 6 months- Delayed bone age on X-rayThe choices given are different causes of short stature. Based on the information provided, the history, exam and bone age findings point towards a delay in puberty and growth rather than an endocrine disorder like congenital adrenal hyperplasia or hypothyroidism. The bone age delay makes constitutional growth delay more likely than familial short stature. Growth hormone deficiency cannot be ruled out based on the information given, but constitutional growth delay seems the most likely based on the delayed puberty and bone age in an otherwise healthy adolescent.A: Constitutional growth delay 