The correct option is
B p+4- Let us first factorize the numerator of the given division p2+5p+4p+1 as follows:
p2+5p+4=p2+p+4p+4=p(p+1)+4(p+1)=(p+4)(p+1)
Since we have to divide p2+5p+4p+1, therefore, we will divide (p+1)(p+4)p+1 as shown below:
(p+1)(p+4)p+1=p+4
Hence, p2+5p+4p+1=p+4.