Spores are disinfected by -: (A) Ethylene oxide, (B) Betapropiolactone, (C) Formaldehyde, (D) Hexachlorophen
Answer is C. Ananthanarayan & Panicker's Textbook of Microbiology 9th edition pg no:34 Formaldehyde is active against the amino group in a protein molecule. In aqueous solution, it is markedly bactericidal and sporicidal and also has a lethal effect on viruses