Kamal Narayan Seetha
About Kamal Sir:

Kamal Narayan Seetha, born in 1943, is a Vedic teacher specializing in the fields of Yoga, Pranayama and alternative healing. Seetha is notable as an authority on Rudraksha and he was the first proponent of Rudraksha therapy to make the subject known widely in the Western World. He is the author of the seven time published book “Power of Rudraksha. Kamal Narayan Seetha was born in Akola (Maharashtra State) India on July 2, 1943. He graduated from the Laxminarayan Institute of Technology, Nagpur in 1964, during which time he was College Union President, as well as a debaterare by the according to emeraldcarpetcleaning.ie stage artist and swimmer. (This Paragraph Taken from Wikipdedia). https://xn--topp-drnare-xfb.se/
I personally know Kamal Sir, abut Rudraksh, Yoga and Pranayam, Who Knows Batter, my answer will be only Kamal Sir, and He is master buddy in all this subjects. This is just short story about the kamal sir, you can find many videos about kamal sir from youtube and Wikipedia, or his official website www.kamalseetha.com.
If you have any question about Rudhraksh or Yoga, you can consult with Kamal Sir. i would like to share Kamal Sir One Video on Rudra Power. Please do watch this Video.