At first, thanx to TeolABM bhai for yr continuous great effort. U rock.

Now I'll comment about the performance of the last round:

Nishita- Her performance was excellent in the 1st song.
Her 2nd song was very melodious, a nice composition of lyrics & music. She started the song very badly but could recover then. Still I don't think her performance was up to the mark in the 2nd song.

Muhin- Chose a tough song as A. Kishore's voice is unique. But Muhin tried his best & performed best. He was marvelous, in a word.
He also sang the 2nd song very well. What I feel that the song was not so melodious esp the lyrics were not much well.

Salma- Performance in the 1st song was good but her pronunciation is awful. The 2nd song was a nice song with rich lyrics & music but she performed poor in that song. Her voice was more harsh than melodious in this song, let alone, pronunciation. When I was hearing her 2nd song by my headphone & keeping my eyes closed(as per TeolABM bhai's advice), it seemed to me that someone was shouting in my ears.

To me:
Nishita- 43 marks
Muhin- 49 marks
Salma- 37 marks