Explanation:

- The original sentence uses "was set up," suggesting the establishment or creation of the NCERT by the government. This is generally correct usage for institutions or organizations.

- Option 1: "was set off" – This phrase is typically used to describe something being triggered or initiated, like an alarm or a series of events, not suitable here.

- Option 2: "was set forward" – This isn't a common phrase for establishing an organization. It suggests moving something to the front, not founding it.

- Option 3: "was set over" – This phrase can imply being put in charge or positioned over something. It's not relevant to setting up an organization.

- Option 4: "was set up" – This is indeed correct. It describes the formation or establishment of an entity. It applies perfectly here for the establishment of NCERT.

“”