Question: Which disinfectants are safe and effective against COVID-19?

Answer passage (source: WHO):
page_title: Questions relating to food businesses
section_headers: What is the most appropriate sanitizer to use on surfaces in a food production environment?
section_content: In general, alcohol-based disinfectants (ethanol, propan-2-ol, propan-1-ol)
have been shown to significantly reduce infectivity of enveloped viruses like
SARS-CoV-2, in concentrations of 70-80% with one-minute exposure time.
Chlorine-based disinfectants (sodium hypochlorite) are effective for surface
decontamination, as are disinfectants with active ingredients based on
quaternary ammonium compounds (QUATS).

Reviewer feedback on this answer:
This answers the question directly. This answer provides information on what type of disinfectants can significantly reduce the infectivity of SARS-CoV-2 virus that causes Covid-19.
This response does a good job mentioning different bases of disinfectants and how effective they are against stopping the spread of COVID. Direct answer that is short and sweet

Reviewer ratings:
Excellent
Excellent

Answer passage (source: WHO):
page_title: Q&A: Considerations for the cleaning and disinfection of environmental surfaces in the context of COVID-19 in non-health care settings
section_headers: Which surface disinfectants are effective against COVID-19 in non-health care setting environments?
section_content: In non-health care settings, sodium hypochlorite (bleach / chlorine) may be
used at a recommended concentration of 0.1% or 1,000ppm (1 part of 5% strength
household bleach to 49 parts of water). Alcohol at 70-90% can also be used for
surface disinfection. Surfaces must be cleaned with water and soap or a
detergent first to remove dirt, followed by disinfection. Cleaning should
always start from the least soiled (cleanest) area to the most soiled
(dirtiest) area in order to not spread the dirty to areas that are less
soiled.  
All disinfectant solutions should be stored in opaque containers, in a well-
ventilated, covered area that is not exposed to direct sunlight and ideally
should be freshly prepared every day.  
In indoor spaces, routine application of disinfectants to surfaces via
spraying is not recommended for COVID-19. If disinfectants are to be applied,
these should be via a cloth or wipe which is soaked in the disinfectant.

Reviewer feedback on this answer:
This information does not provide any information on the safety and effectivity of certain disinfectants against Covid-19 as asked in the question. This information contains recommendation and guidance of how to mix certain chemicals for solutions used to disinfect and clean areas and surfaces in non-healthcare settings.
This is a decent response although it doesn't talk about many disinfectants. It mostly talks about storing them and how to use them. Makes some mention of what is effective

Reviewer ratings:
Bad
Acceptable

Answer passage (source: WHO):
page_title: Q&A: Considerations for the cleaning and disinfection of environmental surfaces in the context of COVID-19 in non-health care settings
section_headers: What protection measures should people take when using disinfectants?
section_content: It is important to reduce your risk when using disinfectants:

The disinfectant and its concentration should be carefully selected to avoid damaging surfaces and to avoid or minimize toxic effects on household members (or users of public spaces).
Avoid combining disinfectants, such as bleach and ammonia, since mixtures can cause respiratory irritation and release potentially fatal gases.
Keep children, pets and other people away during the application of the product until it is dry and there is no odour. 
Open windows and use fans to ventilate. Step away from odours if they become too strong. Disinfectant solutions should always be prepared in well-ventilated areas.
Wash your hands after using any disinfectant, including surface wipes. 
Keep lids tightly closed when not in use. Spills and accidents are more likely to happen when containers are open. 
Do not allow children to use disinfectant wipes. Keep cleaning fluids and disinfectants out of the reach of children and pets. 
Throw away disposable items like gloves and masks if they are used during cleaning. Do not clean and re-use.
Do not use disinfectant wipes to clean hands or as baby wipes.
The minimum recommended personal protective equipment when disinfecting in non-health care settings is rubber gloves, waterproof aprons and closed shoes. Eye protection and medical masks may also be needed to protect against chemicals in use or if there is a risk of splashing.

Note: Where cleaning and disinfection are not possible on a regular basis
due to resource limitations, frequent hand washing and avoiding touching the
face should be the primary prevention approaches to reduce any potential
transmission associated with surface contamination.

Reviewer feedback on this answer:
This information does not answer the question. This is an information about how to safely use disinfectants when cleaning and disinfecting surfaces or areas. This does not provide information on which disinfectants are safe and effective against Covid-19.
This talks about the use of disinfectants and how to keep safe while using them but the question wanted to know which ones are the most effective which isn't mentioned here

Reviewer ratings:
Bad
Could be Improved