" Strain "

On gradual loading , stress - strain relationship for a metal wire is as follows . Within proportionality limit , stress prop strain or, "Stress"/"strain" = a constant for the material of wire. If "Stress"/"Strain" is x in elastic region and y in the region of yield , then

Which of the following is incorrect according to Griffith experiments ? (A) S-Strain to Inject into mice to mice live (B) R-Strain to Inject into mice to mice live (C ) Heat-killed S-Strain to Inject into mice to mice live (D) Heat killed S-Strain + R-Strain to Inject into mice to mice die