Graduate Pharmacy Aptitude Test (GPAT) 2012 Solved Paper

Study the following four statements:
[P] : Gram negative bacteria produce potent pyrogenic substances called endotoxins
[Q]: Ethylene oxide mixed with carbon dioxide or fluorinated hydrocarbons is used in gas sterilization
[R]: D value is the time (for heat or chemical exposure) or the dose (for radiation exposure) required for the microbial population to decline by one logarithmic unit
[S]: Spores of Geobacillus stearothermophilus (Bacillus stearothermophilus) are used for sterility testing of moist heat sterilization process
Choose the correct answer.