Ghosh, who exhibited an amazing fightback on Day 1 to rise from ninth to third, enjoyed a much needed slice of luck as overnight leader Gaurav Gill pulled out of the competition as his car broke down in the sixth stage.
Ghosh tackled the day's three stages cautiously, finishing second in SS5, third in SS6 and again second in SS7 for a cumulative top timing of 00:57:33.6.
It was 5.9 seconds faster than INRC 2's Phalguna Urs and Srikanth, giving them the victory.
The Snap Racing pair of Phalguna and Srikanth, who were hot on Gill's tail all of Saturday, didn't have a fruitful second day, managing only two fourth place and one fifth place finish in the stages.
Phalguna's drive was still good enough to earn his team the INRC 2 win.
The INRC 3 too saw a change in the pecking order, with leaders Suhem Kabeer (Jeevarathinam) of Team Champions slipping out of reckoning in the day's first stage itself after a crash.
It allowed his teammate and defending champion Dean Mascarenhas (Shruptha Padival) to claim the title.
Aroor Vikram Rao (Somayya AG) and local outfit Phurpa Tsering (Chow Tiktha) took the other two places on the podium.
"We started the Rally of Arunachal on an ominous note, taking the ninth place due to a technical issue. But I and Ashwin kept pushing until we managed to bounce back to the pole," a victorious Amittrajit said.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)