When I ask a question Braina continues to answer question I have not asked.
Braina may listen to its own reply and answer question in loop if the microphone is placed near to the speakers (generally in the case of inbuilt microphone). In this case you are suggested to use an external microphone, headset (wired or wireless), or Braina's Android app or iOS app to speak to Braina. Braina's app for Android or iOS can be used to command Braina wirelessly over a WiFi network using your Android phone or tablet.
You may also assign a Voice command prefix from Tools menu -> Settings to solve this issue.