Where splices, angle or U pulls are made, the distance between each raceway entry inside the box and the opposite wall shall not be less than $\_\_\_$ times the trade size of the largest raceway, plus the trade size of all other raceways entering on the same wall in the same row.

Select one:

a$.$

$2$

b$.$

$4$

c$.$

$6$

d$.$

$8$