Which of the following detects clonality in an unknown cell population?

Name: Which of the following detects clonality in an unknown cell population?
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Kappa light chain is only present on B cells and not on T cells or other cell types, so detecting kappa light chain restriction indicates that the population is clonal. CD4-positive T cells and absolute lymphocytosis do not necessarily indicate clonality. Presence of both kappa and lambda light chains on B cells may indicate a polyclonal population.

Which of the Following Detects Clonality in an Unknown Cell