Please select the arm or intervention descriptions that belong to the clinical trial below.
Title: Varenicline for Long-term Nicotine Replacement Therapy (NRT) Users. A Double Blind, Placebo Controlled Trial
Brief Summary: Primary aim: Will varenicline be better than placebo to get long-term users of NRT to stop?

Secondary aim: To assess in details some side effects of varenicline i.e. nausea and abnormal dreams.


Options:
A: Arm Label: varenicline; Type: ACTIVE_COMPARATOR; Interventions: Drug: Varenicline | Arm Label: Nicotine Patches only; Type: ACTIVE_COMPARATOR; Interventions: Drug: Nicotine patches | Arm Label: Nicotine Patches with Nicotine Inhaler; Type: ACTIVE_COMPARATOR; Interventions: Drug: Nicotine patches, Drug: Nicotine Inhaler | Arm Label: varenicline with bupropion; Type: ACTIVE_COMPARATOR; Interventions: Drug: Varenicline, Drug: Bupropion | Intervention Type: DRUG; Name: Varenicline; Assigned to Arm(s): varenicline, varenicline with bupropion | Intervention Type: DRUG; Name: Bupropion; Assigned to Arm(s): varenicline with bupropion | Intervention Type: DRUG; Name: Nicotine patches; Assigned to Arm(s): Nicotine Patches only, Nicotine Patches with Nicotine Inhaler | Intervention Type: DRUG; Name: Nicotine Inhaler; Assigned to Arm(s): Nicotine Patches with Nicotine Inhaler
B: Arm Label: Electronic cigarette condition; Type: EXPERIMENTAL; Interventions: Drug: Electronic cigarette with nicotine (ECwN) plus placebo tablets of varenicline | Arm Label: Varenicline condition; Type: ACTIVE_COMPARATOR; Interventions: Drug: Electronic cigarette without nicotine (ECwN) plus active varenicline tablets | Arm Label: Placebo condition; Type: PLACEBO_COMPARATOR; Interventions: Drug: Electronic cigarette without nicotine (ECwoN) plus placebo tablets of varenicline | Intervention Type: DRUG; Name: Electronic cigarette without nicotine (ECwN) plus active varenicline tablets; Assigned to Arm(s): Varenicline condition | Intervention Type: DRUG; Name: Electronic cigarette without nicotine (ECwoN) plus placebo tablets of varenicline; Assigned to Arm(s): Placebo condition | Intervention Type: DRUG; Name: Electronic cigarette with nicotine (ECwN) plus placebo tablets of varenicline; Assigned to Arm(s): Electronic cigarette condition
C: Arm Label: varenicline; Type: ACTIVE_COMPARATOR; Interventions: Behavioral: support and visits, Drug: varenicline | Arm Label: placebo; Type: PLACEBO_COMPARATOR; Interventions: Behavioral: support and visits, Drug: placebo | Intervention Type: BEHAVIORAL; Name: support and visits; Assigned to Arm(s): placebo, varenicline | Intervention Type: DRUG; Name: varenicline; Assigned to Arm(s): varenicline | Intervention Type: DRUG; Name: placebo; Assigned to Arm(s): placebo
D: Arm Label: Placebo (Slow Metabolizers); Type: PLACEBO_COMPARATOR; Interventions: Drug: Placebo | Arm Label: Varenicline (Slow Metabolizers); Type: ACTIVE_COMPARATOR; Interventions: Drug: Varenicline | Arm Label: Transdermal Nicotine (Slow Metabolizers); Type: ACTIVE_COMPARATOR; Interventions: Drug: Transdermal Nicotine | Arm Label: Placebo (Normal Metabolizers); Type: PLACEBO_COMPARATOR; Interventions: Drug: Placebo | Arm Label: Varenicline (Normal Metabolizers); Type: ACTIVE_COMPARATOR; Interventions: Drug: Varenicline | Arm Label: Transdermal Nicotine (Normal Metabolizers); Type: ACTIVE_COMPARATOR; Interventions: Drug: Transdermal Nicotine | Intervention Type: DRUG; Name: Varenicline; Assigned to Arm(s): Varenicline (Normal Metabolizers), Varenicline (Slow Metabolizers) | Intervention Type: DRUG; Name: Placebo; Assigned to Arm(s): Placebo (Normal Metabolizers), Placebo (Slow Metabolizers) | Intervention Type: DRUG; Name: Transdermal Nicotine; Assigned to Arm(s): Transdermal Nicotine (Normal Metabolizers), Transdermal Nicotine (Slow Metabolizers)

Answer: C