Which of the following statements about Griffith's experiment are c...

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Which of the following statements about Griffith's
experiment are correct?
I. S-strain have mucus (polysaccharide) coat.
II. S-strain are virulent is cause pneumonia infection, while R-strain do not.
III. Transforming principle is associated with genetic material of R-strain.
IV. Transformation of R-strain into S-strain can take place in a test tube.
(a) I and III
(b) III and IV
(c) I, II and IV
(d) II, III and IV
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