MCQ
IVF involves the fertilisation ...$A$.. the body followed by ...$B$...
- A$A-$outside; $B-$teat tube
- ✓$A-$outside; $B-$embryo transfer
- C$A-$inside; $B-$embryo transfer
- D$A-$inside; $B-$zygote transfer
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$R$ : Pathogens often develop resistance to existing antibiotics.

Choose the correct option for $A$ and $B$ to complete the given $NCERT$ statement
| List - l | List - ll |
| (a) Cellular barrier | (i) Interferons |
| (b) Cytokine barrier | (ii) Mucus |
| (c) Physical barrier | (iii) Neutrophils |
| (d) Physiological barrier | (iv) HCI in gastric juice |

| Column$-I$ | Column$-II$ |
| $(a)$ Placenta | $(i)$ Androgens |
| $(b)$ Zona pellucida | $(ii)$ Human Chorionic Gonadotropin $(hCG)$ |
| $(c)$ Bulbo$-$urethral glands | $(iii)$ Layer of the ovum |
| $(d)$ Leydig cells | $(iv)$ Lubrication of the Penis |
$(a)\quad(b)\quad(c)\quad(d)$