Indicate which normal form the following relation conforms to$,$ if any:

Sale$($date$,$ customer#$,$ productCode, vendor, vendor$-$city, salesRep$)$

FD: vendor $---->$ vendor$-$city

FD: product $----->$ vendor

Select one:

a$.2$ NF

b$.1NF$

c$.$ BCNF

d$.3$ NF