Correct

无伴奏

/ wú bànzòu /
Strokes

Example

As an Adjective

unaccompanied

1
qián
sān
jiē
zài
gāngqín
钢琴
bànzòu
伴奏
xià
yǎnchàng
演唱
  
,
zuìhòu
最后
jiē
bànzòu
伴奏
  

He sang the first three verses with a piano and the last one unaccompanied.

2
bànzòu
伴奏
chàng
合唱

cappella