Tejas' reduced RCS is because of its design (No canards and such), It does not have Radar absorbing paint.
Looks like Tejas Mk1 comes with ELTA 2032 PESA. So, it was right in that regard.
Still not sure about OBOGs on mk1 though.
Tejas mk1 has onboard oxygen generator? I think mk1a is supposed to have it not mk1.
Tejas has radar absorbing paint? Isn't that a fifth gen feature?
Tejas mk1 has no AESA radar? Wot?
I don't think this is accurate.