Which type of information on labels and SDSs is essential for responding to pesticide exposure?

The correct choice emphasizes the critical components necessary for effectively addressing pesticide exposure situations. First aid instructions provide immediate steps to take in the event of an exposure incident, ensuring that responders can act quickly to mitigate harm. Symptoms of exposure are equally important, as they help in recognizing the type and severity of exposure, guiding appropriate medical interventions. Furthermore, emergency contact information is essential for facilitating communication with poison control centers or healthcare professionals who can provide additional guidance and support. This combination of information is vital for ensuring the safety and health of individuals who may be at risk of pesticide exposure.

The other choices, while relevant in different contexts, do not directly address the immediate needs arising from pesticide exposure. Proper storage conditions, compatibility of chemical mixtures, expiration dates, and disposal methods pertain more to safety and management of the chemicals themselves rather than to immediate response actions required in emergency situations. Therefore, A is the most appropriate choice as it focuses specifically on the critical information needed when responding to pesticide exposure incidents.