AIDS is characterized by

decrease in the number of killer T-cells

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increase in the number of helper T-cells

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decrease in the number of supressor T-cells

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decrease in the number of helper T-cells

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Solution

The correct option is D decrease in the number of helper T-cells
AIDS is caused by HIV. When HIV enters into helper T-cells, it replicates and produces more virus particles that kill the helper T-cells. Thus, the number of helper T cells decreases in the body of the infected person and the person starts suffering from various infections.

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