Is there any relevance for C# in BCA course because I am now learning C#

Totally, BCA  includes all popular programming languages.  Bachelors in Computer Application, BCA is a three year undergraduate degree course generally for students who wish to delve into the world of Computer languages.

Basic eligibility requirements for a BCA course:

• Aspirant should have passed 10+2 from any stream with English as passing subject with minimum 45%-55% marks in aggregate ( The pass percentage might vary from college to college)
• A student with an Arts or commerce background too can apply.

• While some colleges/universities admit applicants on merit basis, the others admit students on the basis of personal interview and entrances.

Though the syllabus varies in different colleges, but these languages are common in almost every university -

• C++
• C#
• Java
• HTML/CSS
• Javascript
• XML
• SQL/MYSQL
• VB.NET , Etc.

Some even have android development.