**Core Concept**
The RMNCH+A Strategy is a multi-faceted approach to improve maternal, newborn, child, and adolescent health outcomes in India. The "A" in RMNCH+A stands for Adolescent Health, which is a critical component of the strategy to address the unique health needs of adolescents.

**Why the Correct Answer is Right**
The inclusion of Adolescent Health in the RMNCH+A Strategy is essential due to the significant health challenges faced by adolescents in India, including high rates of teenage pregnancy, STIs, and mental health issues. The strategy aims to address these challenges through targeted interventions, such as education, health promotion, and access to reproductive health services. By focusing on adolescent health, the RMNCH+A Strategy seeks to empower adolescents to make informed decisions about their health and well-being.

**Why Each Wrong Option is Incorrect**
* **Option B:** While Reproductive Health is a crucial component of the RMNCH+A Strategy, it is not the "plus" component. Reproductive Health is covered under the "M" in RMNCH+A, which stands for Maternal Health.
* **Option C:** DPT Vaccination is an important public health intervention, but it is not the "plus" component of the RMNCH+A Strategy. Vaccination is a key component of child health, but it is not specifically related to the "A" in RMNCH+A.
* **Option D:** Newborn Health is an essential component of the RMNCH+A Strategy, but it is not the "plus" component. Newborn Health is covered under the "N" in RMNCH+A, which stands for Newborn Health.

**Clinical Pearl / High-Yield Fact**
The RMNCH+A Strategy highlights the importance of addressing the unique health needs of adolescents in India. By focusing on Adolescent Health, the strategy seeks to empower adolescents to make informed decisions about their health and well-being, and to reduce the high rates of teenage pregnancy, STIs, and mental health issues prevalent in the country.

**✓ Correct Answer: A. Adolescent health**