| 1. Primary sex ratio | Sex at the time of conception |
| 2. Secondary sex ratio | Sex at the time of birth |
| 3. Tertiary sex ratio | Sex at the time of enumeration |
| 4. Imbalanced sex ratio | Sex of workers |
A) 1, 2, 3 and 4
B) 1, 3 and 4
C) 2 and 4
D) 1, 2 and 3
Correct Answer: C
Solution :
[c] It is generally divided into four subdivisions: Primary sex ratio - ratio at fertilization Secondary sex ratio - ratio at birth Tertiary sex ratio - ratio in sexually active organisms. Also called adult sex ratio and abbreviated to ASR. ASR is defined as the proportion of adults in a population that are male. Quaternary sex ratio-ratio in post-reproductive organisms measuring these is a problem since they lack clear boundaries.
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