# GATE2016-38

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Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?

1. $CD4^+$ cells make contact with macrophages and stimulate their microbicidal activity.
2. $CD4^+$ cells make contact with B cells and stimulate them to differentiate into plasma cells.
3. $CD8^+$ cells make contact with B cells and stimulate them to differentiate into plasma cells.
4. $CD8^+$ cells make contact with virus infected cells and kill them
1. $Q$ only
2. $Q$ and $S$ only
3. $P, Q$ and $S$ only
4. $P, Q, R$ and $S$
in Others
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