Yeah friend, option (c) Medulla in hind brain is correct friend. Because, the Medulla oblongata is a part of hind brain and its main function is to control involuntary actions in the body.

Medulla oblongata's main function in controlling involuntary actions in the body are:-

* Peristalsis.
* vOmiting.
* Secretion.
* Enzymes.
* Breathing.
*Blood pressure.
* HEart beat.

Tricks to learn the function of Medulla oblongata is,

"POSE B HE " (पोज भी है।). Here, Pose means "Style" B means "Also" HE means "There".

So, In English, "Style also there", where,

P - Peristalsis,
O - vOmiting,
S - Secretion,
E - Enzymes,

B - Breathing, Blood pressure,

HE - HEart beat.

Hope you have understand friend..

The medulla in hindbrain controls involuntary actions in the body.

The hindbrain is the posterior part of the brain, which is responsible for regulating basic bodily functions such as breathing, heart rate, and blood pressure. The medulla oblongata, located in the hindbrain, controls many of these functions through the autonomic nervous system.

The autonomic nervous system is responsible for regulating the body's internal organs and glands, which operate independently of conscious control. The system is divided into two branches:

1. Sympathetic nervous system - responsible for the body's fight or flight response in stressful situations.
2. Parasympathetic nervous system - responsible for the body's rest and digest response during normal functioning.

The medulla oblongata plays a critical role in regulating both branches of the autonomic nervous system. It contains nuclei that control many vital functions such as breathing, heart rate, blood pressure, swallowing, vomiting, and digestion.

In addition to controlling autonomic functions, the medulla oblongata also contains the respiratory center, which regulates breathing by responding to changes in carbon dioxide and oxygen levels in the blood.

Conclusion

In summary, the medulla in hindbrain controls involuntary actions in the body through the autonomic nervous system. It regulates basic bodily functions such as breathing, heart rate, blood pressure, and digestion. The medulla oblongata is a critical component of the hindbrain that plays a vital role in maintaining homeostasis and keeping the body in balance.