某患者上下前牙切端垂直向间隙在3～5mm之间，应诊断为

• A.牙列拥挤Ⅱ度
• B.Ⅱ度深覆<img src="http://timg.fentiku.com/536/2018/6/15/T0u72bmaKR.png" title='T0u72bmaKR.png' alt='T0u72bmaKR.png'/>
• C.Ⅰ度深覆盖
• D.Ⅱ度开<img src="http://timg.fentiku.com/536/2018/6/15/JOGrEzEjab.png" title='JOGrEzEjab.png' alt='JOGrEzEjab.png'/>
• E.Ⅲ度开<img src="http://timg.fentiku.com/536/2018/6/15/oIQy2CnnOO.png" title='oIQy2CnnOO.png' alt='oIQy2CnnOO.png'/>

正确答案：D