The correct option is D Both B and C
The most current antibiotics available are from the prokaryotes that include the Bacillus and Streptomyces. For example, the antibiotic gramicidin is obtained from the six antibiotic compounds and the six antibiotics related to the Bacillus species. Streptomyces accounts to nearly one-third of the antibiotics available right now. the antibiotics include antibacterial, antifungal and antiparasitic. Rhizobium is also used in antibiotic production but it has failed in the symbiotic performance. Thus, the correct answer is option D.