A mixture of heat- killed NL-cells (dead cells) and live L- cells is injected into mice. NL- type cells are pathogenic, develop a disease and kill the animals. On the other hand L- type cells are nonpathogenic. The expected results could be `:`

Options

A. mice develop disease and die
B. `50%` mice develop disease and die
C. mice die without developing disease
D. all mice remain healthy but lose vision

Answer

A