Final answer:
The question incorrectly assumes that Cement, Perlite, Lime, or Mortar is a common plasticizer used in concrete; however, plasticizers are typically specific compounds added to concrete to improve workability, not the components listed.
Step-by-step explanation:
The most common plasticizer used in concrete is not one of the options provided (Cement, Perlite, Lime, Mortar). Instead, plasticizers or dispersants are additives designed to increase the plasticity or decrease the viscosity of a material. Typically, compounds like phthalates or polymeric plasticizers are used in various applications, including concrete, to improve its workability and to reduce water content.
The options listed are components of concrete or materials used in masonry, but not plasticizers. Cement is a binder used to create concrete by binding sand and gravel. Perlite is a volcanic glass used for insulation and as a lightweight aggregate in plaster and concrete. Lime and Mortar are materials traditionally used in construction but they're not plasticizers. For concrete, specific admixtures are used to serve as plasticizers, which are not explicitly named in the question or provided options.