Explanation

The Defence Acquisition Council cleared the procurement of 83 Tejas Light Combat Aircraft in late 2017, and the IAF's subsequent order made the Tejas the largest indigenous aircraft procurement. The question's option set pairs 'Tejas' with 'Light Combat Aircraft', which is its correct description. Fighter aircraft as a generic class is not the specific answer; the Tejas is the light combat aircraft being procured. Hence the answer is the Tejas.