input: Write a python function to create a Student object and return its details.
  assert create_student(1, "John Doe", "john@example.com", "1234567890") == "Student ID: 1, Name: John Doe, Email: john@example.com, Contact No.: 1234567890"
  assert create_student(2, "Jane Smith", "jane@example.com", "0987654321") == "Student ID: 2, Name: Jane Smith, Email: jane@example.com, Contact No.: 0987654321"
  assert create_student(3, "Alice Johnson", "alice@example.com", "1122334455") == "Student ID: 3, Name: Alice Johnson, Email: alice@example.com, Contact No.: 1122334455"
output: def create_student(student_id, name, email, contact_no):
      class Student:
          def __init__(self, student_id, name, email, contact_no):
              self.student_id = student_id
              self.name = name
              self.email = email
              self.contact_no = contact_no
          
          def get_details(self):
              return f"Student ID: {self.student_id}, Name: {self.name}, Email: {self.email}, Contact No.: {self.contact_no}"
      
      student = Student(student_id, name, email, contact_no)
      return student.get_details()