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# Both B and T-cells of immune system are produced in

$\begin{array}{1 1}(A)\;\text{Spleen}\\(B)\;\text{Lymphoid nodes}\\(C)\;\text{Bone marrow}\\(D)\;\text{Thymus}\end{array}$

Both B and T-cells of immune system are produced in bone marrow
Hence (C) is the correct answer.