OK Mr. Super Intelligent I skipped it as they were in short form.
Now Pl refer to AK official website link I provided.
Army Guide - Al-Khalid, Main battle tank
It says that Muzzle velocity for APFSDS round is 1760 m/s which is over 2100 m/s for Arjun MK 1
AK HEAT (muzzle velocity 850 m/s) and HE-FRAG (muzzle velocity 950 m/s) which is at least 500 m/s high for arjun MK 1.
Arjun gun is classified as super velocity gun at Par with L series gun of Germany used in Abrahm. it operates at a very high pressure of 800 MPa.
It uses hyper velocity ammunition which can parish any armor.
120 Millimetre MBT Arjun Armament System
Now do not cheat your country man by giving false data. Tell them that AK can fire HEAT (muzzle velocity 850 m/s) and HE-FRAG (muzzle velocity 950 m/s) only.
And prove your maturity by writing something meaningful which doesn't appear in it. Saying me idiot or some body to go to school doesn't make you great. Now you have over 4000 post to your account. People expect more from you on PDF.