Step 1: Puranas Classification.
The 18 major Puranas are categorized into three groups: Sattvika (Vishnu-related), Rajasa (Brahma-related), and Tamasa (Shiva-related).
Each group comprises six Puranas.
Step 2: Markandeya Purana Overview.
Markandeya Purana is classified as a Rajasa Purana, signifying activity, creation, and worldly concerns.
It is also notable for containing the Devi Mahatmya (Durga Saptashati), which extols Goddess Durga and her victories over demons.
Step 3: Option Analysis.
- Koorma Purana: Falls under the Sattvika category (dedicated to Vishnu).
- Markandeya Purana: Correctly classified under Rajasa Puranas.
- Linga Purana: Belongs to the Tamasa category (dedicated to Shiva).
- Garuda Purana: Falls under the Sattvika category (Vishnu-related).
Step 4: Conclusion.
Therefore, the correct answer is Markandeya Purana, a Rajasa Purana.