The scales of Behag are as follows :
Arohanam (Ascending) : S G3 M1 P N3 D2 N3 S’
Avarohanam (Descending) : S’ N3 D2 P M1 G3 M1 G3 R2 S
It is a Janya Raga, derived from Dhira Shankharabharanam, 29th on the Melakarta scale.
This raga is an import from Hindustani Music. Predominantly used for short tukkada pieces and light songs sung at the tail end of concerts, There a number of small compositions in this raga which I enjoy such as Muruganin Maru Peyar Azhagu by Guru Surajananda, Aadum Chidambaramo and Idu Dano Thillai Sthalam by Gopalakrishna Bharathi, Narayana Te Namo Namo by Annamacharya, Saramaina by Swati Thirunal. There is also a lovely Thillana by Lalgudi Jayaraman which I like very much.
Note : The 12 notes in the octave are named as below. Please note that C is used as Sa for the sake of simplicity as the scale is relative in Carnatic Music. Also note that the scales paint only a superficial picture of the raga as the gamakas(ornamentations) are a very important part of a raga.
Music To My Ears 
Dear Madam,
I have seen in other places that in avarohanam we will get both M1 and M2. Please advice me which is correct ?
I am sorry, but it is I who am in error. There is both M2 and M1 in the avarohana, which should be S N3 D2 P M2 G3 M1 G3 R2 S. Sorry for the oversight and confusion, I will correct my post.
Cheers. Suja
still can it be a derivation of “Dhira Shankharabharanam”
I think this whole ‘derivation’ thing is rather fitting what is there as best as possible…I have reservations about giving this too much importance..
Sir I want HINDHUSTANI MUKAARI Ragam notes
I am not aware of a Mukhari ragam in Hindustani. There is Basant Mukhari which you can read about here : https://autrimncpa.wordpress.com/basant-mukhari-vasant-mukhari/
Cheers. Suja
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GOOD WORK
Both nishadams are also used in avarohanam