निम्नलिखित में से कौन खाद्य पदार्थों में एक दिखाई देने वाले (दृश्यमान) जैविक खतरे का प्रतिनिधित्व करता है?

Which of the following is a chemical hazard in food?

Which of the following is an example of a physical hazard in food?

According to standard food safety regulations, all foods that are to be held cold must be kept at a temperature of _________ or below.