The study consists of Screening Phase(4 weeks before administration of study drug),Active Treatment Phase(Week 0-Week 44),Follow Up Phase(Week 44-Week 56).During various study periods,safety assessments(example\[e.g\] recording of adverse events,Vital signs,Tuberculosis evaluation,Chest radiograph,Urine pregnancy Test);Efficacy assessments(e.g IGA,PASI);Clinical Laboratory Assessments(e.g haematology,chemistry);Biomarkers/Genetic evaluations,will be performed per the study procedures.The primary hypotheses are that guselkumab treatment is non-inferior to secukinumab as assessed by proportion of participants achieving PASI 90 response at Week 48 with noninferiority margin of 10% and,once non-inferiority is established,that guselkumab is superior to secukinumab as assessed by proportion of participants achieving PASI 90 response at Week 48.