Which of the statements regarding this figure are true?
1. They are Gram-negative bacteria called fungal bacteria.
2. They are Gram-positive bacteria called fungal bacteria.
3. They form calcareous conidia like fungi.
4. They contribute to 90% of broad-spectrum antibiotics of the world.
Gram-positive bacteria are fungal bacteria. This is characteristic of bacteria that have a cell wall composed of a thick layer of a particular substance called peptidoglycan. They do form calcareous conidia as they have a cushion-like fruiting body and they contribute about 90% of the antibiotics of the world.
So, the correct option is B.