Final answer:
The Heart Protector channel does not end on a specific finger; it runs along the inner arm and ends in the chest region, protecting the heart.
Step-by-step explanation:
The Heart Protector channel is a concept in Traditional Chinese Medicine (TCM). It does not end on any specific finger. Instead, it runs along the inner arm and ends in the chest region, protecting the heart.
In TCM, fingers are associated with different meridians or channels, but the Heart Protector channel primarily affects the heart and does not end on a specific finger.
Therefore, the correct answer is none of the given options: (a) Thumb, (b) Index finger, (c) Middle finger, or (d) Ring finger.