Infeasible paths in software testing is a path that is impossible to achieve or exercise with any set of inputs. Considering the code below, are there any infeasible paths in the code$-$ explain your answer. $(8)$

A: marks$($input$)$

B: if marks $<50$

C: then b $=2$

D: else c $=3$

E: if marks $>90$

F: then d $=4$

G: End