Read the following statements carefully and identify the incorrect statement$(s)$.
$(1)$ In $AIDS$,the count of $CD4$ cells increases.
$(2)$ Malignant tumors are cancerous tumors.
$(3)$ Pneumonia is a life-threatening disease.
$(4)$ Asthma can be caused by allergies.
$(5)$ Antibodies are made up of $\gamma$-globulin proteins.

• A
  $(1)$ only
• B
  $(2)$ and $(3)$
• C
  $(4)$ and $(5)$
• D
  $(1)$ and $(4)$