Which of the following statements is incorrect regarding fungi?

$A$ cell wall containing chitin is found in .........

Plant diseases caused by $Ustilago$ fungus are called $SMUTS$ because

There is a myth that immediately after heavy rains in forests, mushrooms appear in large numbers and form a very large ring or circle, which may be several metres in diameter. These are called as "fairy rings". Can you explain this phenomenon of fairy rings in biological terms? Discuss the mycelial structure in $Agaricus$ and its soil-borne nature.

Match the correct class for the given examples:
$(1)$ Puccinia,$(2)$ Colletotrichum,$(3)$ Albugo,$(4)$ Claviceps,$(5)$ Agaricus.

They do not perform photosynthesis and obtain nutrition through absorption.