Hey Sirish, It is tough to say which is best one. But if your friend is a beginner in trekking then choose easy one - Kedarkantha trek. If he has some experience then choose new, less crowded winter trek — Brahmatal trek. Happy traveling!!!
Hey Sirish, i had been to winter kuari pass and that's the best ... ask him to go to this and it's also Trek taht can be taken by anyone ... Happy Trekking!!!
Har ki doon- Har Ki Doon Trek in Uttarkashi, best trekking place in a beautiful meadow in Uttaranchal. Its a cradle shaped hanging valley within a height of 3566 meters above the sea level. In the month of October to March the valley is covered by the snow. It’s a beautiful place for trekking that no one can imagine so if you are thinking to plan a trek then you must visit this beautiful place.
I guess Kedarkantha would be the best. I went there when I was a beginner, and the experience was awesome. However, if he wants to try something new, ask him to go to the Brahmatal Trek.