Complex sentence: Candidates therefore have to attempt the subjects of English and Environmental Education, and must also attempt three, four or five other subjects that may be chosen by the candidate from a wide range of subjects ranging from Fashion Designing to Biology to Political Science.
Split into simpler sentences: Candidates therefore have to attempt the subjects of English and Environmental Education and three to five other subjects of the candidate's choosing. The candidate can choose a wide range of subjects, ranging from Fashion Design to Biology to Political Science.