The correct answer is: Only conclusion I follows.
The statement “The standard of education in private schools is much better than Municipal and Zila Parishad-run schools” does not provide enough information to support the conclusion “All Municipal and Zila Parishad schools should be closed immediately.” It is possible that the standard of education in Municipal and Zila Parishad-run schools could be improved, even if it is currently lower than the standard of education in private schools.
The statement does provide enough information to support the conclusion “The Municipal and Zila Parishad should make serious efforts to improve standard of their schools.” If the standard of education in Municipal and Zila Parishad-run schools is lower than the standard of education in private schools, then it is in the best interests of the students and the community to improve the quality of education in these schools.
Conclusion I is a logical consequence of the statement, while conclusion II is not. Therefore, the correct answer is: Only conclusion I follows.