New Delhi: Amid a raging political controversy, the National Commission for Women on Monday issued a notice to BJP MLA Sadhana Singh and sought an explanation for making “extremely offensive and unethical” remarks against BSP chief Mayawati. Singh was severely criticised by the BJP allies and the opposition leaders for calling BSP supremo Mayawati a “blot on womankind”. Meanwhile, former BSP MLA Vijay Yadav announced that he would give Rs 50 lakh to the person who beheads Sadhna Singh the BJP MLA in the thick of a controversy for calling Mayawati