A social challenge faced by some parts of Sikkim is:

Gender inequality
Communal tensions
Alcoholism
Illiteracy

The correct answer is: a) Gender inequality.

Gender inequality is a social challenge faced by some parts of Sikkim. It is a condition in which women and girls are treated differently from men and boys, and have fewer opportunities and rights. This can be seen in the following ways:

  • Women are less likely to be educated than men.
  • Women are less likely to be employed than men.
  • Women are paid less than men for the same work.
  • Women are more likely to be victims of violence than men.

Gender inequality is a serious problem that needs to be addressed. It can have a negative impact on the lives of women and girls, as well as on the development of society as a whole.

Here is a brief explanation of each option:

  • Communal tensions are tensions between different religious or ethnic groups. They can lead to violence, discrimination, and other problems.
  • Alcoholism is a condition in which a person has a dependency on alcohol. It can lead to health problems, financial problems, and relationship problems.
  • Illiteracy is the inability to read or write. It can prevent people from getting jobs, participating in society, and taking care of themselves.