1.

Which of the following pairs are correctly matched ?1. Primary sex ratio-Sex at the time of conception 2. Secondary sex ratio-Sex at the time of birth3. Tertiary sex ratio-Sex at the time of enumeration4. Imbalance sex ratio-Sex of workersSelect the correct answer using the codes given below

A. 1, 2, 3 and 4
B. 1, 3 and 4
C. 2 and 4
D. 1, 2 and 3
Answer» E.


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