In the formation of ascorbic acid,the micro-organism used is

Alexander Fleming in $1929$ discovered:

Which of the following is an antibiotic?

Ethyl alcohol is commercially manufactured from

The larger distribution of clean quality milk all over the world can be said to be due to the great work of:

Identify the mismatch regarding the microbes and their industrial products as listed in $NCERT$:
$(A)$ $Acetobacter$ $aceti$ : Acetic acid
$(B)$ $Clostridium$ $butylicum$ : Butyric acid
$(C)$ $Aspergillus$ $niger$ : Citric acid
$(D)$ $Lactobacillus$ : Ethanol