(a) whether the United States of America (USA), as of now, is the top supplier of defence components and materials to the Indian Armed Forces;
(b) if so, the amount spent on procurement of defence weapons from USA during the last two years;
(c) whether the Hercules Aircrafts purchased from America in 2011-12 were having alleged illegal Chinese parts supplied by a Chinese company; and
(d) if so, the details thereof and action taken by the Government in this regard?