In an autoimmune disease,.........

Given below are two statements. Select the most appropriate answer from the given options.
Statement-$I$: $T$-lymphocytes have $4$ subtypes as helper,killer,memory,and suppressor $T$-cells.
Statement-$II$: $B$-lymphocytes mature in the thymus and are responsible for cell-mediated immunity.

Which of the following represents the property of immunoglobulins?

Which of the following is a characteristic feature of acquired immunity?

Transplantation of tissues or organs often fails because the patient's body rejects them. Which type of immune response is responsible for this rejection?

Describe innate immunity.