What does it mean to relax with deep breathing?

Question

A. Inhale slowly through the nose, hold breath for a few seconds and exhale through the mouth
B. Inhale quickly through the mouth, hold breath for a few seconds and exhale through the nose
C. Inhale slowly through the mouth, exhale through one’s teeth
D. Inhale slowly through the mouth, hold breath for a few seconds and exhale through the nose

Answer 1

What does your text say? What is your answer?

Answer 2

I think it is B. It is more sensible and legit

Answer 3

I think so, but I have not read your text. I'm not sure it makes a big difference whether you inhale through the nose or mouth, but whatever your text says is what you should answer.

Answer 4

B is not the answer.