question_answer

If \[{{\mathbf{5}}^{\mathbf{log}}}{{^{_{\mathbf{5}}}}^{\mathbf{4}}}\mathbf{+}{{\mathbf{4}}^{\mathbf{lo}{{\mathbf{g}}_{\mathbf{x}}}\mathbf{3}}}\mathbf{=7}\] then the value of x is _________

A) 1                                                         

B) 2            

C) 3                                                         

D) 4

E) None of these