The introduction of job-oriented courses (1)/in the self-financing colleges (2)/ attract many students (3)./ No error (4)

Answer

3

Explanation

attracts will replace attract because - The introduction of job - oriented courses (Main Subject) is in Singular. Hence, the Verb will also be in Singular, as a Verb agrees with its Subject in Number. Singular Subject → Singular Verb (Main Verb + S) Plural Subject → Plural Verb (Main Verb without S) Hence, attracts many students is the right usage.