Step 1: Concept
The Drugs (Prices Control) Order (DPCO) 2013 is issued by the government to regulate the prices of essential medicines.
Step 2: Meaning
Schedule I of the DPCO contains the National List of Essential Medicines (NLEM), which are subject to price capping.
Step 3: Analysis
This list is categorized into various therapeutic sections based on the clinical use of the drugs (e.g., Anaesthetics, Anti-infectives). In the 2013 order, this schedule was organized into 27 distinct sections.
Step 4: Conclusion
Therefore, the total number of sections in Schedule I of DPCO 2013 is 27.
Final Answer: (C)