Which is the completely factored form of the following equation?



4a4b2−21a2b+5=0

A

(4a2b−1)(a2b−5)=0



B

(2a2b+5)(2a2b+1)=0



C

(4a2b−1)(ab−5)=0



D

(4a2b+1)(a2b+5)=0