The correct answer is: Only I is implicit.
The statement only says that the SCTE has laid down guidelines for minimum qualifications for teachers. It does not say anything about whether the authorities will appoint only qualified teachers or whether only qualified people will apply for the teaching post. Therefore, only assumption I is implicit.
Assumption II is not implicit because the statement does not say anything about whether only qualified people will apply for the teaching post. It is possible that even though the SCTE has laid down guidelines for minimum qualifications, some unqualified people may still apply for the teaching post.
Assumption III is also not implicit because the statement does not say anything about whether the SCTE decides all the norms of educational qualifications for teaching faculty. It is possible that other organizations or bodies may also have a role in deciding the norms of educational qualifications for teaching faculty.
Therefore, only assumption I is implicit.