- AImmune bodies
- BVaccines
- CMedicines
- DAntibiotics
Explanation:
Immunization provides resistance to a particular disease by prior activation of an immune response.
It may be natural or artificial. Natural immunization is provided through the placental cord by the mother and artificial immunization is acquired by the process like vaccines.
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$I.$ This method is also known as biolistic technique
$II. $ In this method cells are bombarded with high velocity micro-particles of gold or tungsten coated with $DNA$ in plants
$III.$ Important crop plants like maize, rice and wheat have now been transformed by this method
Which of the statements given above are correct?
Reason: Immune system weakens during $HIV$ infection.