Correct option is (c) Site-specific drug delivery
The explanation: Pharmaceutical applications are those where the undesirable properties and the physicochemical problems can be solved. These are, for example, improving taste, odour, change of physical form, reduction in GI irritation, reduction of pain on injection. Pharmacokinetic applications are such as enhancement of bioavailability, prevention of presystemic metabolism, prolongation of the duration of action, reduction of toxicity, etc.