The correct option is
B Tetracycline
Calvacin is a potent, antitumor mucoprotein which is cumulative in effect and which causes a prolonged intoxication characterized by anorexia and extreme weight loss and obtained from
Calvatia gigantea. Tetracycline is a broad-spectrum antibiotic produced by the
Streptomyces genus of actinobacteria, indicated for use against many bacterial infections. It is a protein synthesis inhibitor. Ergotamine is an ergot derivative. It works by narrowing blood vessels in the brain, which helps to relieve migraine headaches.
Aspergillus niger or
A. niger is a fungus and one of the most common species of the genus
Aspergillus.
A. niger is cultured for the industrial production of many substances. Various strains of
A. niger are used in the industrial preparation of citric acid and gluconic acid and have been assessed as acceptable for daily intake by the World Health Organisation.
Thus, the correct answer is option C.