Consider the following statements about immunological disorder. i. Deficiency in immune response is called immunodeficiency. ii. Inappropriate immune response against self antigen is called auto immunity iii. Immunodeficiency resulting from a genetic or developmental defect is called primary immunodeficiency. iv. Severe combined immune deficiency is due to secondary immune deficiency

Question

$\begin{array}{1 1} \text{a. Only i,ii and iii} \\ \text{b. Only ii, iii and iv} \\ \text{c. Only i,ii and iv} \\ \text{d. All are true.} \end{array}$