**Core Concept**
Mission Indradhanush is a national health mission in India that aims to immunize children under the age of 2 years and pregnant women against seven vaccine-preventable diseases. The mission includes a comprehensive vaccination schedule that covers various vaccines.

**Why the Correct Answer is Right**
The vaccines included in Mission Indradhanush are:

* Diphtheria, Tetanus, and Pertussis (DTP)
* Hepatitis B
* Rubella
* Measles
* Tuberculosis (BCG)
* Polio
* Hib (Haemophilus influenzae type b)

The vaccine not included in Mission Indradhanush is the Rotavirus vaccine, which is used to prevent severe diarrhea caused by the rotavirus. The Rotavirus vaccine is, however, included in the Universal Immunization Programme (UIP) of India.

**Why Each Wrong Option is Incorrect**
**Option A:** The DTP vaccine is included in Mission Indradhanush, so this option is incorrect.
**Option B:** The Hepatitis B vaccine is included in Mission Indradhanush, so this option is incorrect.
**Option C:** The Hib vaccine is included in Mission Indradhanush, so this option is incorrect.
**Option D:** The Rotavirus vaccine is not included in Mission Indradhanush, making this the correct option.

**Clinical Pearl / High-Yield Fact**
It's essential to note that while Mission Indradhanush focuses on seven vaccine-preventable diseases, the Universal Immunization Programme (UIP) includes additional vaccines such as the Rotavirus vaccine and the Japanese Encephalitis vaccine.

**Correct Answer: D. Rotavirus vaccine**