Select the correct option to fill up the blanks.
Channel: Doubtnut
Date: 2020-08-16

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.