Which of the following types of bacteria were used in Griffth's transformation experiment?
(a) Dipolcoccus R-III and S - II type
(b) Pneumcoccus ,T2 phage
(c) Streptococcus, R- II and S- III types
(d) Diplococcus, E.coil

Options

A. Dipolcoccus R-III and S - II type
B. Penumcoccus , `T_(2)` phage
C. Streptococcus, R- II and S- III types.
D. Diplococcus, E.coil

Answer

**Step-by-Step Solution:**

1. **Understanding Griffith's Experiment**: Griffith's transformation experiment was a landmark study in genetics that demonstrated the phenomenon of transformation in bacteria. It involved the use of different strains of bacteria to show how genetic material could be transferred.

2. **Identifying the Bacteria Used**: In his experiment, Griffith specifically used two strains of the bacterium *Streptococcus pneumoniae*. One strain was virulent (disease-causing) and had a smooth appearance (S type), while the other was non-virulent (not disease-causing) and had a rough appearance (R type).

3. **Analyzing the Options**:
- (a) Dipolcoccus R-III and S-II type: This does not refer to the correct strains used in the experiment.
- (b) Pneumococcus, T2 phage: T2 phage is a virus, not a bacterium used in the experiment.
- (c) Streptococcus, R-II and S-III types: This option refers to the correct strains used in Griffith's experiment, as it mentions *Streptococcus pneumoniae* and the R and S types.
- (d) Diplococcus, E. coli: E. coli is not the bacterium used in Griffith's experiment.

4. **Conclusion**: Based on the analysis, the correct answer is option (c) Streptococcus, R-II and S-III types.

**Final Answer**: (c) Streptococcus, R-II and S-III types.

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