Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Leuconostocs spp. produce diacetyl from citrate metabolism, but Lactococcus lactis spp. lactis do not do the same.
Reason (R): The plasmid coding for citrate utilization genes are present in Leuconostoc, but not in Lactococcus lactis spp. lactis.
In light of the above statements, choose the most appropriate answer from the options given below: