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3.Reproductive Health
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In India the number of females per thousands males had been constantly decreasing but in which of the following years, the number had been increased
A
$1971-1981$
B
$1981-1991$
C
$1951-1961$
D
$1961-1971$
Solution
It's Obvious
Standard 12
Biology
Similar Questions
Match the following columns
| Column-I | Column- II |
| $(A)$ Pill | $(1)$ Intra uterine device |
| $(B)$ Condom | $(2)$ Prevents ovulation |
| $(C)$ Vasectomy | $(3)$ Prevents sperms from reaching to cervix |
| $(D)$ Cu – T | $(4)$ Semen contains no sperms |
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