How to use unique function here

I have

A={{[1,3,4],[1],[2,3,4,6,8]},{[1,2,34],[1,2,3,4,5,6,7],[1,2,9,6,4],[1,3,4]},{[8,9],[2,3,4,6,8],[1,3,4]}};
 A = cellfun(@(x) unique(x,'rows'),A,'uniformoutput',false);

when I want to use unique function it gives me this error

Error using cell/unique (line 4)
Cell array input must be a cell array of character vectors.

I want to have this result

A={[1,3,4],[1],[2,3,4,6,8],[1,2,34],[1,2,3,4,5,6,7],[1,2,9,6,4],[8,9]}

Answer 1

[Bhaskar R]

inn_A = [A{:}];
str_A = cellfun(@(x)num2str(x(:)'),inn_A,'UniformOutput',false);
[~,idx,idx2] = unique(str_A);
Result = inn_A(idx);