I watch Big boss telugu regularly from season 1 to 5. I missed season 3 a bit. But I regularly watch it.
This season 5. I have my findings. Shanmukh is playing safe and he is actual Gunta Nakka of Big boss which nataraj master claimed dialogue as gunta nakka.
Shanmuk or naddimuk. He always nominates the one who got already nominated many times on that specific day.
