Narmada Bachao Andolan ( NBA) has demanded CBI inquiry into the purchase of power from Maheshwar Hydro- electric project, which is now Rs 10 per unit and it has become unviable. If Madhya Pradesh does not withdraw, NBA will knock the doors of a court. NBAs Alok Agrawal said, " As per Tariff Order of the MPERC for the year 2011- 2012, the cost of power in MP is Rs. 2.44 per unit. Cost of power from the two upcoming private power projects in Madhya Pradesh - Essar Power and Torrent- is Rs. 2.45 per unit and Rs. 3.31 per unit respectively.