Microbial source for the production of enzyme invertase is...

Invertase is an enzyme that catalyzes the hydrolysis of sucrose into a mixture of glucose and fructose, commonly known as invert sugar.

The most common and widely used microbial source for the commercial production of the enzyme invertase is the yeast Saccharomyces cerevisiae.

Aspergillus niger is primarily used for the production of citric acid and enzymes like pectinase and amylase.

Candida lipolytica is known for the production of lipases.

Trichoderma konigii is a source of cellulase enzymes.

Answer: Saccharomyces cerevisiae