Which one of the following is correct?

Which one of the following is correct?

Infantry Regiment is also known as the Mechanized Infantry Regiment.
Corps of Electrical and Mechanical Engineers is subsumed in the Corps of Engineers.
Army Medical Corps and Army Dental Corps are two divisions of the Army Service Corps.
Army has its own Corps of Air Defence.
This question was previously asked in
UPSC CDS-2 – 2016
The correct statement is D.
The Indian Army has a distinct Corps of Army Air Defence (A AD), responsible for providing air defence cover to field formations and vital installations.
(A) Infantry and Mechanised Infantry are separate arms. (B) The Corps of Electronics and Mechanical Engineers (EME) is a separate corps from the Corps of Engineers. (C) The Army Medical Corps (AMC) and Army Dental Corps (ADC) are distinct corps responsible for medical and dental services; the Army Service Corps (ASC) handles logistics, supply, and transport.