Final answer:
Interlaced scanning and synchronizing the video signal between the camera and monitor are techniques used to avoid flicker in the television picture.
Step-by-step explanation:
In order to avoid flicker in the television picture, interlaced scanning is used. Interlaced scanning is a technique where the television screen is divided into two fields: odd lines and even lines. Instead of scanning all the lines at once, the odd lines are scanned first and then the even lines are scanned, creating a flicker-free image.
Additionally, synchronizing the video signal between the camera and monitor helps in avoiding flicker. This ensures that the video signal is transmitted and displayed smoothly without any interruptions.
Therefore, the correct options to avoid flicker in the television picture are using interlaced scanning and synchronizing the video signal between the camera and monitor.