Select the correct option to fill up the blanks.
$(i)$ Diseases which are easily transmitted from one person to another,are called $.....$ diseases.
$(ii)$ In human body,parasite of malaria initially multiplies within the $........$ and then attack the $......$
$(iii) ......$ is the yellowish fluid secreted by mother during the initial days of lactation.
$(iv) ......$ and $.......$ are the primary lymphoid organs.

• A
  $(i)$ infectious,$(ii)$ Bone marrow,thymus,$(iii)$ Colostrum,$(iv)$ Liver cells,$\text{RBCs}$
• B
  $(i)$ infectious,$(ii)$ Liver cells,$\text{RBCs}$,$(iii)$ Colostrum,$(iv)$ Bone marrow,thymus
• C
  $(i)$ interferon,$(ii)$ Bone marrow,thymus,$(iii)$ Colostrum,$(iv)$ Liver cells,$\text{RBCs}$
• D
  $(i)$ infectious,$(ii)$ liver cells,$\text{RBCs}$,$(iii)$ Colostrum,$(iv)$ Spleen,lymph node