Stearic acid belongs to the class of lubricants, pharmaceutical excipients used to reduce the friction between the tablet and the machinery. Croscarmellose belongs to the class of disintegrants, excipients that promote disintegration of the pharmaceutical form in order to promote the dissolution of the active ingredient. Aspartame belongs to non-nutritive sweeteners. Lactose is an example of diluents (aka fillers), pharmaceutical excipients used to create volume if the volume of the active ingredient is inadequate.
The correct answer is B.*
*sometimes pharmaceutical excipients may be used interchangeably.
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