| Column - I (Name) | Column - II (Relations) | ||
| A | Bombyx mori | P | Disease of mulberry |
| B | Morus alba | q | Centre where silkworm egg are produced and supplied |
| C | Grainage | r | Silk moth |
| D | Powdery mildew | s | Mulberry plant |
| t | Freshly hatched silkworm |
A) \[A=q,\,B=r,\,C=s,D=t\]
B) \[A=r,\,B=s,\,C=q,\,D=p\]
C) \[A=r,\,B=q,C=t,\,\,D=s\]
D) \[A=s,\,B=r,\,C=q,\,D\]= t
Correct Answer: B
Solution :
Bombyx mori is the common silk moth. Morus alba is the common variety of mulberry plant. Disease free silkworm eggs are supplied by seed production centres, which are called the grainages. Powdery mildew is the common disease of mulberry plant,
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