Please select the eligibility criteria that correspond to the clinical trial below.
Title: A 52-Week, Phase 3, Randomized, Active Comparator and Placebo-Controlled, Parallel Design Study to Evaluate the Efficacy and Safety/Tolerability of Subcutaneous Tildrakizumab (SCH 900222/MK-3222), Followed by an Optional Long-Term Safety Extension Study, in Subjects With Moderate-to-Severe Chronic Plaque Psoriasis (Protocol No. MK-3222-011)
Brief Summary: This study is being conducted to evaluate the efficacy and safety/tolerability of tildrakizumab (SCH 900222/MK-3222) in a population of participants with moderate-to-severe plaque psoriasis. The primary hypotheses of the study are that tildrakizumab is superior to placebo in the treatment of moderate-to-severe chronic plaque psoriasis as measured by the proportion of participants achieving \>= Psoriasis Area Sensitivity Index of 75% (PASI-75) response and the proportion of participants with a Physician's Global Assessment (PGA) score of "clear" or "minimal" with at least a 2 grade reduction from baseline at Week 12.


Options:
A: Inclusion Criteria:

* Clinical diagnosis of moderate-to-severe plaque psoriasis for at least 6 months prior to enrollment;
* Candidate for phototherapy or systemic therapy;
* Premenopausal female participants must agree to abstain from heterosexual activity or use a medically approved method of contraception or use appropriate effective contraception as per local regulations or guidelines
* For the extension study: must have completed Part 3 of the base study
* For the extension study: must have achieved at least a PASI-50 response by the end of Part 3 of the base study

Exclusion Criteria:

* Non-plaque forms of psoriasis
* Presence or history of severe psoriatic arthritis and is well-controlled on current treatment regimen
* Women of childbearing potential who are pregnant, intend to become pregnant, or are lactating
* Participant is expected to require topical therapy, phototherapy, or systemic therapy during the trial
* Presence of any infection or history of recurrent infection requiring treatment with systemic antibiotics
* Previous use of entanercept, tildrakizumab (MK-3222), or other interleukin-23 (IL-23)/T- helper cell 17 (Th-17) pathway inhibitors including p40, p19, and IL-17 antagonists
* Latex allergy or sensitivity
* Active or untreated latent tuberculosis (TB)
* For the extension study: women of child-bearing potential who are pregnant, intend to become pregnant within 6 months of completing the trial, or are breast feeding
* For the extension study: active or uncontrolled significant organ dysfunction or clinically significant laboratory abnormalities
* For the extension study: expected to require topical treatment, phototherapy, or systemic treatment during the extension study
B: Inclusion Criteria:

* Subjects must give a written, signed and dated informed consent
* Chronic plaque-type psoriasis present for at least 6 months before randomization
* Moderate to severe plaque psoriasis as defined at randomization by:

  * PASI score of ≥12 and
  * Body Surface Area (BSA) affected by plaque-type psoriasis ≥10% and
  * IGA mod 2011 ≥3 (based on a scale of 0-4)
* Candidate for systemic therapy, defined as having psoriasis inadequately controlled by:

  * Topical treatment (including topical corticosteroids) and/or
  * Phototherapy and/or
  * Previous systemic therapy

Exclusion Criteria:

* Forms of psoriasis other than plaque psoriasis
* Drug-induced psoriasis
* Ongoing use of prohibited treatments
* Previous exposure to secukinumab or any other biologic drug directly targeting IL-17A or IL-17RA, or ustekinumab, or any therapies targeting IL-12 or IL-23
* Use of any other investigational drugs within 5 half-lives of the investigational treatment before study drug initiation
* Pregnant or nursing (lactating) women

Other protocol-defined inclusion/exclusion criteria may apply
C: Inclusion Criteria:

* Patients with chronic plaque type psoriasis having body surface area involvement of \> 20%
* Patients of either sex
* Females who have completed their family and are tubectomized or are postmenopausal i.e. no menstrual bleeding over at least 1 year
* Age range 18-65 years

Exclusion Criteria:

* Females of child bearing potential
* H/O hypersensitivity to acitretin
* Impaired hepatic function (serum bilirubin, AST, ALT and alkaline phosphatase \>1.5 times the upper limit of normal)
* Impaired renal function (serum creatinine \>1.5mg% in males and \>1.4 mg% in females)
* Hyperlipidemia
* BMI \>30 kg /m2
* H/O excessive alcohol use
* Diabetes mellitus
* Congestive heart failure
* Ischemic heart disease
D: Inclusion Criteria:

* Subject has had stable moderate to severe plaque psoriasis for at least 6 months.
* Subject has received at least one previous phototherapy or systemic psoriasis therapy or has been a candidate to receive phototherapy or systemic psoriasis therapy in the opinion of the investigator.
* Subject has involved BSA ≥ 10% and PASI ≥ 12 at screening and at baseline.

Exclusion Criteria:

* Subject diagnosed with erythrodermic psoriasis, pustular psoriasis, medication-induced, or medication-exacerbated psoriasis.
* Evidence of skin conditions at the time of the screening visit (eg, eczema) that would interfere with evaluations of the effect of investigational product on psoriasis.
* Subject has any active Common Terminology Criteria for Adverse Events (CTCAE) grade 2 or higher infection
* Subject has a significant concurrent medical condition or laboratory abnormalities, as defined in the study protocol.
* Subject has used the following therapies within 14 days of the first dose: topical calcineurin inhibitors including tacrolimus

  , topical vitamin A, activated form D3 or activated form D3 analogue preparations, weak through strong topical steroids (excluding application on the scalp, axillae, and groin)
* Subject has used the following therapies within 28 days of the first dose: any other systemic psoriasis therapy (eg, vitamin A, calcineurin inhibitors, methotrexates, steroids), UVA therapy (with or without psoralen), very strong or strongest topical steroid, tar therapy
* Subject has used the following therapies within 3 months of the first dose: adalimumab, etanercept, infliximab, or live vaccines
* Subject has used ustekinumab within 6 months of the first dose
* Subject has previously used an anti-interleukin-17 biologic therapy

Answer: A