【名词&注释】
恢复期(convalescence)、传染源(source of infection)、肺顺应性(lung compliance)、先天性肾上腺皮质增生症(congenital adrenal hyperplasia)、感染者(infection)、羟化酶(hydroxylase)、羟类固醇脱氢酶(hydroxysteroid dehydrogenase)
[单选题]男婴,6个月。因发热3d,呕吐、精神差1d入院。查体:皮肤色素深,脱水明显,阴茎较同龄儿大。测血清电解质:钠126mmol/L,钾5.8mmol/L,氯91mmol/L。明确诊断为最常见类型的先天性肾上腺皮质增生症。请问此病是哪个酶缺陷
A. 3-β羟类固醇脱氢酶(hydroxysteroid dehydrogenase)
B. 11-β-羟化酶(hydroxylase)
C. 17-羟化酶(hydroxylase)
D. 18-羟化酶(hydroxylase)
E. 21-羟化酶(hydroxylase)