Which coolant base is typical for most engines but toxic if ingested?

Which coolant base is typical for most engines but toxic if ingested?

• A. Propylene glycol-based (non-toxic, often used where safety is needed).
• B. Ethylene glycol-based (typical, toxic if ingested).
• C. Water-based coolant.
• D. Alcohol-based coolant.

Answer: (B)