JD(U) president Sharad Yadav today asked BJP to follow the example of its senior leader L K Advani, who had resigned as an MP after his name appeared in the Hawala case, and said it should ask its Union minister and chief ministers facing graft charges to quit. With Parliament being stalled by the opposition demanding resignations of Union Minister Sushma Swaraj and Rajasthan and Madhya Pradesh Chief Ministers Vasundhara Raje and Shivraj Singh Chouhan, Yadav said their resignation would not prove their involvement in the scams and that they can come back, if cleared in probe.<br/><br/>Yadav said in a statement that when the UPA was in power, the opposition had united to demand resignations of its tainted ministers and normal work resumed in Parliament only after they quit.