Which of the following is a deterministic (non-stochastic) effect?

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Multiple Choice

Which of the following is a deterministic (non-stochastic) effect?

Explanation:
Deterministic effects appear only after a certain dose and their severity grows with higher exposure. Erythema fits this pattern because skin reddening occurs only once a threshold dose to the skin is reached (typically around a couple of grays for an acute exposure) and becomes more pronounced as the dose increases. In contrast, the other listed effects—cancer, leukemia, and genetic mutations—are stochastic: they can occur at any dose with probability that increases with dose, but there isn’t a sharp threshold for their occurrence. So erythema is the deterministic, threshold-based response, while the others are probabilistic risks.

Deterministic effects appear only after a certain dose and their severity grows with higher exposure. Erythema fits this pattern because skin reddening occurs only once a threshold dose to the skin is reached (typically around a couple of grays for an acute exposure) and becomes more pronounced as the dose increases. In contrast, the other listed effects—cancer, leukemia, and genetic mutations—are stochastic: they can occur at any dose with probability that increases with dose, but there isn’t a sharp threshold for their occurrence. So erythema is the deterministic, threshold-based response, while the others are probabilistic risks.

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