Psoriasis Area and Severity Index (PASI):Combined assessment of lesion severity and affected area into a single score: 0 (no disease) to 72(maximal disease). Body is divided into 4 areas for scoring (head, trunk, upper limbs and lower limbs); each area is scored by itself and scores are combined for final PASI. For each area, percent of skin involved is estimated: 0 (0%) to 6 (90-100%), and severity is estimated by clinical signs, Erythema,Thickening (plaque elevation, induration) \& Scaling(desquamation). Scale 0 (none) to 4 (maximum). Final PASI = sum of severity parameters for each area\* area score weight of section(head: 0.1, upper limbs: 0.2 body: 0.3 lower limbs: 0.4). Psoriasis Area and Severity Index (PASI) will be assessed/calculated as per standard procedure. PASI 75 represents the percentage (or number)of patients who have achieved a 75% or more reduction in their PASI score from baseline. PASI 100 indicates patients who have achieved a complete resolution of all disease.

Investigator will assess the disease using the validated Investigator Global Assessment (IGA) mod 2011 and rate the disease from a score of 0 (clear skin) to 4 (severe disease)

A subject was considered as a PASI 90 responder if s/he achieved a reduction of 90% or more of the PASI score, compared to baseline, at a given time point.The head, trunk, upper limbs and lower limbs were assessed separately for erythema, thickening, and scaling. PASI scores can range from a lower value of 0, corresponding to no signs of psoriasis, up to a theoretic maximum of 72.0, i.e., higher scores represent more severity.