Which one among the following is the oldest regiment of the Indian Arm

Which one among the following is the oldest regiment of the Indian Army ?

The Punjab Regiment
The Madras Regiment
The Dogra Regiment
The Gorkha Rifles
This question was previously asked in
UPSC CAPF – 2010
The Madras Regiment is the oldest infantry regiment of the Indian Army. Its origins can be traced back to the 1750s during the Carnatic Wars when various companies of Indian sepoys were raised by the British East India Company, which were later consolidated.
The Madras Regiment predates other listed regiments and holds the distinction of being the oldest infantry regiment of the Indian Army.
The Punjab Regiment also has old components tracing back to the 18th century, but the formal raising date of the Madras Regiment as a collective entity is considered earlier. The Dogra Regiment was raised in the late 19th century, and the Gorkha Rifles (various regiments) have their origins in the early to mid-19th century.