Explanation:

Yellow Fungus is also called mucor septic. It is a fungal infection that medical experts say generally does not occur in humans but in reptiles.
Causes

• Poor Hygiene
• High levels of humidity beyond the 30-40% range
• Old food and improper disposal also contribute to the growth of the fungus.
• Excess use of steroids is also a possible reason in Covid-19 patients.

Symptoms

• Symptoms of yellow fungus are laziness, loss of appetite, or no appetite at all and weight loss.
• Yellow fungus infection, unlike the two other infections, could be much more dangerous as it starts off internally. Thus, its diagnosis is very difficult.

Hence only statement 1st is correct.