Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE Student_Enrolment (semester_id VARCHAR)
TABLE: CREATE TABLE Semesters (semester_name VARCHAR, semester_id VARCHAR)

### Question ###
What is the semester which most student registered in? Show both the name and the id.

### Accurate SQL ###

SELECT T1.semester_name, T1.semester_id FROM Semesters AS T1 JOIN Student_Enrolment AS T2 ON T1.semester_id = T2.semester_id GROUP BY T1.semester_id ORDER BY COUNT(*) DESC LIMIT 1