(a) whether all the refineries in the country except BRPL have already upgraded their process technology to meet diesel quality (Bharat Stage-II) with effect from April, 2005;
(b) if so, whether the Government have any plan to upgrade their process technology for meeting Bhart Stage-II and Bharat Stage-III specifications from April, 2005 and 2010 (likely to advance to 2007), respectively;
(c) if so, the details thereof including action taken so far in this regard; and
(d) if not, the reasons therefor?