The term applied to organisms able to at relatively low temperatures is which of the following?

The term applied to organisms able to at relatively low temperatures is which of the following?
A. halophile
B. thermophile
C. mesophile
D. psychrophile
E. none of the above

Which of the following would be most effective for disinfecting meical instruments (although expensive)
A. alcools
B. soaps and detergents
C. ethylene oxide
D. biguanides
E. Quaternary ammonium compunds

Which of the following would be least likely to be affected by quaternary ammonium compounds?
A. Pseidomonas sp.
B. E. coli
C. gram positive bacteria
D. mycobacteria
E. viruses