Question: The 8x8 wheeled amphibious armoured personnel carrier provided by the Sri Lanka Armoured Corps replaced which two vehicles

Context paragraphs:
Enigma APC: The Enigma 8X8 wheeled amphibious armored personnel carrier was developed by Emirates Defense Technology in UAE.  It was introduced at IDEX 2015.

Sri Lanka Armoured Corps: The Sri Lanka Armoured Corps (SLAC) provides the armour capability of the Sri Lanka Army, with vehicles such as the T-55, T-55AM2, and Type 69 main battle tanks, the BMP infantry fighting vehicle and the BTR-80, and WZ551 armoured personnel carriers.  It comprises six regular armoured regiments and a volunteer (reserve) regiment.  It has an independent Armoured Brigade and is headquartered at Rock House Army Camp, Colombo.

BTR-80: The BTR-80 (Russian: бронетранспортер /Bronetransporter, literally "Armoured Transporter") is an 8x8 wheeled amphibious armoured personnel carrier (APC) designed in the USSR.  It was adopted in 1986 and replaced the previous vehicles, the BTR-60 and BTR-70, in the Soviet Army.  It was first deployed during the Soviet war in Afghanistan.

1st Canadian Armoured Carrier Regiment: 1st Canadian Armoured Carrier Regiment (1CACR) (also known as the 1st Canadian Armoured Personnel Carrier Regiment) was an armoured regiment of the Canadian Army formed during the late stages of World War II in the European theatre.  It was formed in October 1944 at Tilburg with the original 1st Canadian Armoured Personnel Carrier Squadron as its core.  It was the only Canadian regiment to be both formed and disbanded overseas.  The new regiment’s purpose was to serve as a specialized armoured unit equipped with modified tanks used to safely carry infantry to their objectives.  The concept of such armoured personnel carriers was an entirely new innovation, and it was through the 1CACR’s efforts that their effectiveness was proven, revolutionizing the tactical handling of infantry in battle.

TAB-63: TAB-63 (Romanian: "Transportor Amfibiu Blindat model 1963", Amphibious Armoured Personnel Carrier model 1963) was an experimental Romanian prototype of an armoured personnel carrier.  Basically, the Romanian engineers used the hull of a Soviet BTR-60P armoured personnel carrier and installed a number of Romanian auto parts in it.  Although the design never entered production, the prototype represented the predecessor of the TAB-71 model.

BTR-7: The BTR-7 "Defender" (BTR-70DI) (BTR; Бронетранспортер / Bronetransporter, literally Armoured Transporter) is a 8x8 wheeled armoured personnel carrier (APC) designed in Ukraine by the NRMZ.  The BTR-7 is an upgrade of the BTR-70.

VBTP-MR Guarani: The VBTP-MR Guarani (Portuguese > "Viatura Blindada Transporte de Pessoal - Média de Rodas"; "Armored Personnel Carrier Vehicle - Medium Wheeled Type") is a 6×6 armoured personnel carrier developed by Iveco and the Brazilian Army as part of its "URUTU-III" modernization program aimed to replace all EE-11 Urutu by 2015.  The VBTP-MR is based on a 6×6 version of Iveco's Superav armoured personnel carrier.  In the program other Brazilian Companies also participated, such as IMBEL (Communications), ELBIT (Armaments), Usiminas and Villares (development of national ballistic structural steel).

BTR-4: The BTR-4 "Bucephalus" (BTR; Ukrainian: Бронетранспортер / Bronetransporter, literally Armoured Transporter) is a 8x8 wheeled armoured personnel carrier (APC) designed in Ukraine by the Kharkiv Morozov Machine Building Design Bureau (SOE KMDB) as a private venture.  The prototype, which was designed as a private venture, was unveiled at the Aviasvit 2006 exhibition held in Ukraine in June 2006.

ASLAV: The Australian Light Armoured Vehicle (ASLAV) is an Australian light armoured vehicle designed and manufactured by General Dynamics Land Systems Canada.  The vehicle is based on the MOWAG Piranha 8x8 design.  It is a highly mobile, eight wheeled amphibious armoured vehicle used for reconnaissance and surveillance operations.

OT-62 TOPAS: The OT-62 TOPAS is a series of amphibious tracked armoured personnel carriers developed jointly by Poland and Czechoslovakia (ČSSR).  OT-62 stands for "Obrněný Transportér vzor 62" – "armoured personnel carrier model 62".  TOPAS stands for "Transportér Obrněný Pásový" – "tracked armoured personnel carrier".

Supporting paragraphs: Sri Lanka Armoured Corps BTR-80
Answer: BTR-60 and BTR-70