This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Microbiology
All of the following are true regarding disinfectants except: 
Select and explain. 
A. Glutaraldhyde is sporicidal, B. Hypochlorites are virucidal, C. Ethylene oxide is intermediate disinfectant, D. Phenol is bactericidal and readily inactivated by organic matter
D: Phenol is bactericidal and readily inactivated by organic matter
Answer: D: Phenol is bactericidal and readily inactivated by organic matter 
Explanation: Ans.d. Phenol isbactericidaiand readily inactivated by organic matter Ref: Ananthanarayan 7/e p30, 31, 32; Jawetz 24/e p6]Phenols are bactericidal, but these are not readily inactivated by organic matter. Effective againstSusceptible to organic matterDisinfectantBacteriaSporesVirusFormaldehyde+++++++++-Glutaraldehyde+++++++++-Chlorine (hypochlorite)++++/-++++++Phenols++(+)-++/-