गोविन्द भाष्य (श्रील बलदेव विद्याभूषण - अचिन्त्यभेदाभेद वेदान्त ब्रह्मसूत्र भाष्य सटीक)

Adhikaraṇa 7
The Principal Prāṇa (Life-Force) is the Primary Instrument of the Soul
Introduction by Śrīla Baladeva Vidyābhūṣaṇa
Here someone may object: Is it not so that if it is to be counted among the
senses, the principal prāṇa must have a function to perform where it assists the
soul? The principal prāṇa has no such function. Also, if the principal prāṇa is one
of the senses, then the senses, beginning with the eyes, would be twelve in
number.
In the following words the author of the sūtras answers this objection.
Sūtra 11
akaraṇatvāc ca na doṣas tathā hi darśayati
akaraṇatvāt—because of not having a sepcific function; ca—and; na—no;
doṣaḥ—fault; tathā—so; hi—indeed; darśayati—shows.
Also, there is no fault in not having a function, for the scriptures show it.
Purport by Śrīla Baladeva Vidyābhūṣaṇa
The word "ca" (also) is used to answer the previous objection. The word
"karaṇa" here means “activity". It is not a defect on the part of the prāṇa that is
has no specific function to assist the soul, for it does have an important function in
that it is the support and the resting place of the physical senses. That is the
meaning here. In the following passage, the Chāndogya Upaniṣad (5.1.1) shows
this:
atha ha prāṇā aham śreyasi vyūdire. . . .