Match the columns:

Column-$I$	Column-$II$
$(a)$ Aspergillus niger	$(1)$ Lactic acid
$(b)$ Acetobacter aceti	$(2)$ Citric acid
$(c)$ Clostridium butyricum	$(3)$ Acetic acid
$(d)$ Lactobacillus	$(4)$ Butyric acid

(A) The correct matches are as follows:
$(a)$ Aspergillus niger produces Citric acid $(2)$.
$(b)$ Acetobacter aceti produces Acetic acid $(3)$.
$(c)$ Clostridium butyricum produces Butyric acid $(4)$.
$(d)$ Lactobacillus produces Lactic acid $(1)$.
Therefore,the correct matching is $(a-2, b-3, c-4, d-1)$.