MCQ
Correct sequence is
- ✓Palaeozoic $ \to $ Mesozoic $ \to $ Coenozoic
- BMesozoic $ \to $ Archaeozoic $ \to $ Proterozoic
- CPalaeozoic $ \to $ Archaeozoic $ \to $ Coenozoic
- DArchaeozoic $ \to $ Palaeozoic $ \to $ Proterozoic
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| Column-I | Column-II |
| $(A)$ Barrier | $(1)$ Copper$-T$ |
| $(B)$ $IUD$ | $(2)$ Vasectomy and tubectomy |
| $(C)$ Surgical technique | $(3)$ Condoms cervical Caps |
| $(D)$ Adminisitrating hormones | $(4)$ Oral, pill and saheli |
$(i)$ Sickle - cell anaemia is controlled by three pairs of allele.
$(ii)$ Trisomy is chromosomal disorder.
$(iii)$ $47$ chromosome present in person whose having Turner's syndrome.