Please select the eligibility criteria that correspond to the clinical trial below.
Title: An Exploratory Phase 2a, Randomized, Double-blind, Placebo-controlled, Multicenter Study To Assess Mechanism Of Action (Moa) Of Cp-690,550 In The Skin When Administered Orally At 10 Mg Twice Daily (Bid) For 12 Weeks In Subjects With Moderate To Severe Chronic Plaque Psoriasis
Brief Summary: There are cells in the skin and blood of humans with chronic moderate to severe plaque psoriasis with specific activities that may determine the effectiveness of treatment. These activities may be described by obtaining samples of skin and blood and analyzing them using a variety of tests.


Options:
A: Inclusion Criteria:

* Adults over 18 years of age with a diagnosis of chronic moderate to severe plaque psoriasis for at least 12 months; in generally good health; on stable dose of non-prohibited medications; able to stop current psoriasis therapy (systemic or topical) for several weeks prior to and during study participation.

Exclusion Criteria:

* Serious underlying disease including viral disorders such as hepatitis or HIV or skin condition that would interfere with skin biopsies or evaluation of psoriasis; conditions that could interfere with drug absorption after oral administration; history of malignancy or auto-immune disease.
* Use of oral or injected corticosteroids (steroids).
B: Inclusion Criteria:

* Present with moderate-to-severe chronic plaque psoriasis based on a diagnosis of chronic psoriasis for at least 6 months before baseline.
* Participants who are candidates for systemic therapy and who are naive to systemic treatment for psoriasis.
* Have a (PASI score \>10 or BSA \>10) and DLQI \>10 at screening and at baseline.

Exclusion Criteria:

* Have predominant pattern of pustular, erythrodermic, and/or guttate forms of psoriasis.
* Have received systemic nonbiologic psoriasis therapy.
* Have prior, concurrent, or recent use of ixekizumab or any other biological psoriasis therapy.
* Have any condition or contraindication as addressed in the local labeling for MTX or FAE.
* Presence of significant uncontrolled cerebro-cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, hematologic, neurologic, or neuropsychiatric disorders or abnormal laboratory values at screening.
* Have severe gastrointestinal disease, oral ulcer, or known, active gastrointestinal ulcer.
* Have had a serious infection or are immunocompromised.
* At screening, participants with significant, present, or early liver disease, e.g., explained by alcohol consumption or hepatic insufficiency.
C: Inclusion Criteria:Patients eligible for inclusion in this study have to fulfill all of the following criteria:

* Diagnosis of PsA classified by CASPAR criteria and with symptoms for at least 6 months with moderate to severe PsA who must have at Baseline ≥3 tender joints out of 78 and ≥3 swollen out of 76 (dactylitis of a digit counts as one joint each)
* Rheumatoid factor and anti-CCP antibodies negative at screening
* Diagnosis of active plaque psoriasis or nail changes consistent with psoriasis or documented history of plaque psoriasis
* Subjects with PsA should have taken NSAIDs for at least 4 weeks prior to randomization with inadequate control of symptoms or at least one dose if stopped due to intolerance to NSAIDs
* Subjects taking corticosteroids must be on a stable dose of ≤10 mg/day prednisone or equivalent for at least 2 weeks before randomization and should remain on a stable dose up to Week 24
* Subjects taking MTX (≤ 25 mg/week) are allowed to continue their medication if the dose is stable for at least 4 weeks before randomization and should remain on a stable dose up to Week 52.

Exclusion Criteria:Patients fulfilling any of the following criteria are not eligible for inclusion in this study:

* Chest X-ray or chest MRI with evidence of ongoing infectious or malignant process, obtained within 3 months prior to screening and evaluated by a qualified physician
* Subjects taking high potency opioid analgesics (e.g. methadone, hydromorphone, morphine)
* Previous exposure to secukinumab or other biologic drug directly targeting IL-17 or IL-17 receptor
* Ongoing use of prohibited psoriasis treatments / medications (e.g., topical corticosteroids, UV therapy) at randomization. The following wash out periods need to be observed:
* Oral or topical retinoids 4 weeks
* Photochemotherapy (e.g. PUVA) 4 weeks
* Phototherapy (UVA or UVB) 2 weeks
* Topical skin treatments (except in face, scalp and genital area during screening, only corticosteroids with mild to moderate potency) 2 weeks
* Subjects who have ever received biologic immunomodulating agents except for those targeting TNFα, investigational or approved
* Previous treatment with any cell-depleting therapies including but not limited to anti-CD20, investigational agents (e.g., CAMPATH, anti-CD4, anti-CD5, anti-CD3, anti-CD19)
D: Inclusion Criteria:

* Body Mass Index (BMI) of 17 to 40 kg/m2
* Subjects must have two comparable psoriatic lesions measuring between 9 and 100 cm2 and these target lesions must be similar in size to each other, and separated by at least 15 cm.

Exclusion Criteria:

* Subjects with lesions solely involving the palms of the hands or soles of the feet or intertriginous areas, the scalp or the face.
* Subjects with pustular psoriasis or erythroderma.
* Subjects currently on other topical agents or UVB therapy within 2 weeks of the first dose of study medication.
* Subjects receiving PUVA within 4 weeks of the first dose of study medication.
* Subjects receiving systemic retinoids, etanercept, adalimumab or efalizumab or oral immunosuppressives within 3 months prior to the first dose of study medication.
* Subjects receiving any other biological therapy (infliximab, alefacept, abatacept, etc) within 3 months of the first dose of study medication.

Answer: A