This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pediatrics
Which of the following statements about 21 alpha hydroxylase deficiency is false 
Select and explain. 
A. Most common cause of congenital adrenal hyperplasia in children, B. Affected females present with ambiguous genitalia, C. Affected males present with prococious pubey, D. Hypokalemic alkalosis is seen
D: Hypokalemic alkalosis is seen
Answer: D: Hypokalemic alkalosis is seen 
Explanation: Most common cause of congenital adrenal hyperplasia. 21 - hydroxylase deficiency should be suspected in neonates with ambiguous genitalia, polyuria, shock, recurrent vomiting and features of sepsis with a negative septic screen. In 21-hydroxylase deficiency, excessive androgenic activity causes signs of masculinization in females, ranging from clitoral hyperophy and pseudohermaphroditism in infants (ambiguous genitalia) to oligomenorrhea, hirsutism, and acne in postpubeal females. In males, androgen excess is associated with enlargement of the external genitalia and other evidence of precocious pubey in prepubeal patients and oligospermia in older males And hypokalemic alkalosis is not a feature of 21-hydroxylase deficiency. Reference: OP Ghai essential paediatrics, 8th edition,page no 526