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 slowly through the mouth, hold breath for a few seconds and exhale through the nose

C. Inhale quickly through the mouth, hold breath for a few seconds and exhale through the nose

D. Inhale slowly through the mouth, exhale through one’s teeth

a?

Answer 1

I think you're right.