how to combine two array of cells into one cellwise

I have two cell arrays with cells of different dimension and i want to combine them into one

as,

A={ [2,3 ; 2,7] [3,2 ;3,4 ;3,8] [4,3 ; 4,5] [5,4 ; 5,10] }

B={ [2,3,4 ; 2,3,8 ; 2,7,8 ; 2,7,12] [3,2,7 ; 3,4,5 ; 3,8,7] [4,3,2 ; 4,3,8 ; 4,5,10] [5,4,3] }

and I want answer to be like,

C={ [2,3,4,7,8,12] [2,3,4,5,7,8] [2,3,4,5,8,10] [3,4,5,10]

please help

Answer 1

[the cyclist]

A={ [2,3 ; 2,7]	[3,2 ;3,4 ;3,8]	[4,3 ; 4,5] 	[5,4 ; 5,10] };
B={ [2,3,4 ; 2,3,8 ; 2,7,8 ; 2,7,12]   [3,2,7 ; 3,4,5 ; 3,8,7]  [4,3,2 ; 4,3,8 ; 4,5,10]  [5,4,3] };

C = cellfun(@(x,y)union(unique(x),unique(y)).',A,B,'UniformOutput',false);

C{:}

ans = 1×6

2 3 4 7 8 12

ans = 1×6

2 3 4 5 7 8

ans = 1×6

2 3 4 5 8 10

ans = 1×4

3 4 5 10