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Question: What is required to activate a Cytotoxic T cell?

A known antigen bound to MHC-I
A Helper T cell bound to an antigen and MHC-II and macrophage
Any antigen on an MHC-II, whether new to the body or not
An antigen that has been encountered previously

Please select correct answer and also provide explaination.

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Biology, Academics

Category:- Biology
Reference No.:- M91172159

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