Bengaluru, Oct. 23 -- Polling for four Karnataka Legislative Council constituencies began at 8 am on Friday, with the ruling Congress taking on the BJP-JD(S) alliance in a contest that will test the Opposition partners' electoral coordination and their ability to consolidate support among graduates and teachers.

Voting will continue until 4 pm, while counting of votes is scheduled for October 27.

The four constituencies going to the polls are South-East Graduates', West Graduates', North-East Teachers' and Bengaluru Teachers'.

The BJP has fielded candidates in the South-East Graduates', West Graduates' and North-East Teachers' constituencies, while its ally JD(S) is contesting the Bengaluru Teachers' constituency.

The BJP currently hold...