Which of the following sectors, even after the changes of 1991, remained a public sector?a.Railwaysb.Constructionc.Bankingd.Communication

To answer the question regarding which sectors remained a public sector even after the changes of 1991 in India, it's essential to analyze the impact of the liberalization policies introduced during that time.

1. Railways: The Indian Railways continued to be a public sector entity after 1991, as it plays a crucial role in transportation and is managed by the government.

2. Construction: The construction sector saw a significant amount of privatization and liberalization, allowing private entities to undertake major projects, thus not remaining strictly in the public sector.

3. Banking: While some reforms occurred, many banks remained under government control. However, this sector started to see the entrance of private and foreign banks post-liberalization.

4. Communication: The telecommunications sector experienced substantial privatization in the 1990s, moving away from being solely under public control.

Final Answer

The sector that remained a public sector after the changes of 1991 is a. Railways.