Acidity of BF3 can be explained on the basis of which of the following concepts?

(1) Arrhenius concept

(2) Bronsted Lowry concept 

(3) Lewis concept

(4) Bronsted Lowry as well as Lewis concept

Hint: BF3 accepts lone pair from base

GN Lewis in 1923 defined an acid as a species which accepts an electron pair and base which donates and electron pair. As BF3 is an electron deficient compound, hence, it is a Lewis acid and it accepts electron from lewis base