Kolkata: A probe into actor Saif Ali Khan’s stabbing has led Mumbai Police to question a woman in West Bengal, for allegedly providing a mobile phone SIM card to the Bangladeshi national who had entered the country illegally, and has been arrested for the attack. Police sources said the woman, Khukumoni Sheikh, is from Chapra in Nadia district and was allegedly known to the accused Bangladeshi national, Shariful Islam.  “The SIM card the accused was using during his stay in India was traced to the woman. The woman is being questioned,” a source said.  Police had earlier said that Islam entered India through Meghalaya seven months ago and stayed in Bengal for a few weeks, before moving to Mumbai in search of a job. Cops involved in the interrogation of the accused said the 30-year-old crossed the Dawki river, along the India-Bangladesh border in Meghalaya, to illegally enter India. He then changed his name to Bijoy Das and began living in the country. Islam is a native of Jhalokathi district in Bangladesh, they said. Police …