What is the concentration of a given toxic material that generally may be tolerated without ill effects?

What is the concentration of a given toxic material that generally may be tolerated without ill effects?

A. Toxicity
B. Threshold limit value (TLV)
C. Long-term exposure limit (LTEL)
D. Acute exposure limit (AEL)

Correct answer is option C. Threshold limit value (TLV). Explanation: Threshold limit value (TLV) is the concentration of a given toxic material that generally may be tolerated without ill effects.