Egg yolk contains lecithin which acts a an emulsifier. It can be used to stabilize emulsions. Adding egg yolk to a mixture of oil and water prevents the two liquids from separating.

Egg yolk contains lecithin which acts a an emulsifier. It can be used to stabilize emulsions. Adding egg yolk to a mixture of oil and water prevents the two liquids from separating.
A、正确
B、错误
正确答案：A