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Syllabus
(1) the selection of four red marbles;
(2) the selection of one white and three red marbles;
(3) the selection of one white , one blue and two red marbles;
(4) the selection of one marble of each colour.
The smallest total no. of marbles satisfying the given condition is
(A) 19 (B)21
(C)46 (D)69