NOC selection Skill type A or skill type B as per job duties

[Gurjit_Sidhu]

I have experience more than 4 years in dry wall construction , my job title is production engineer noc code 2141, but duties performed by me falls under NOC 9227 foreman in prefabrication. I am unable to decide, which noc i have to select skill type A or B as I did my bachelor in Mechanical engineering.