Correct

叫号

/ jiào háo / 
Strokes

Example

As a Verb

call out the numbers (of waiting patients, etc)

1
Tā
她
zuò
坐
zài
在
zhěnshì
诊室
wài
外
  
,
děng
等
zhāo
着
yīshēng
医生
jiàoháo
叫号
  
。

She sat outside the treatment room, waiting for her number to be called.

As a Verb

chant a work song

As a Verb

challenge; provoke