Match the columns and choose the correct combination
`{:(,(a),"Polychaeta",(p),"Scorpion"),(,(b),"Trematoda",(q),"Pila"),(,(c),"Arachnida",(r),"Liver Fluke"),(,(d),"Gastropoda",(s),"Nereis"),(,"","",(t),"Star Fish"):}`

Options

A. a-s, b-r, c-p, -d-q
B. a-r, b-s, c-p, d-t
C. a-q, b-s, c-t, d-p
D. a-t, b-q, c-s, d-t

Answer

To solve the matching question, we need to correctly pair each item from the first column with the appropriate item from the second column. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Identify Polychaeta**:
- Polychaeta refers to a class of annelid worms, commonly known as polychaetes.
- The genus **Nereis** is a well-known example of polychaete worms.
- **Match**: (a) Polychaeta → (s) Nereis

2. **Identify Trematoda**:
- Trematoda is a class of flatworms, commonly known as flukes.
- The **Liver Fluke** is a notable member of this class and is known to be parasitic.
- **Match**: (b) Trematoda → (r) Liver Fluke

3. **Identify Arachnida**:
- Arachnida is a class of joint-legged invertebrates that includes spiders, scorpions, and others.
- The **Scorpion** is a representative member of this class.
- **Match**: (c) Arachnida → (p) Scorpion

4. **Identify Gastropoda**:
- Gastropoda is a class of mollusks that includes snails and slugs.
- The genus **Pila** refers to a type of freshwater snail, which falls under this class.
- **Match**: (d) Gastropoda → (q) Pila

### Final Matches:
- (a) Polychaeta → (s) Nereis
- (b) Trematoda → (r) Liver Fluke
- (c) Arachnida → (p) Scorpion
- (d) Gastropoda → (q) Pila

### Correct Combination:
The correct combination is:
- A → S
- B → R
- C → P
- D → Q