Match the following and select the correct option for ribosomes and its constituent rRNA.
`{:("(i) 50 s","(a) 16 s"),("(ii) 30 s","(b) 18s"),("(iii) 40 s","(c) 23 s"),("(iv) 60s","(d) 5.8s"):}`

Options

A. i –b, ii –d, iii– a, iv – a
B. i –c, ii –a, iii– b, iv – d
C. i –a, ii –b, iii– c, iv – d
D. i –d, ii –c, iii– a, iv – b

Answer

To solve the question of matching ribosomes with their constituent rRNA, we will analyze the provided information step by step.

### Step 1: Understand Ribosome Structure
Ribosomes are composed of two subunits, which can be categorized into prokaryotic and eukaryotic ribosomes. Prokaryotic ribosomes are 70S, made of 50S and 30S subunits, while eukaryotic ribosomes are 80S, made of 60S and 40S subunits.

### Step 2: Identify rRNA Components
- **Prokaryotic Ribosomes:**
- **50S Subunit:** Contains 5S rRNA and 23S rRNA.
- **30S Subunit:** Contains 16S rRNA.

- **Eukaryotic Ribosomes:**
- **60S Subunit:** Contains 5.8S rRNA, 5S rRNA, and 28S rRNA.
- **40S Subunit:** Contains 18S rRNA.

### Step 3: Match Each Ribosomal Subunit with its rRNA
Now we will match the ribosomal subunits with their respective rRNA components based on the information above.

1. **50S Subunit**:
- Contains 5S rRNA and 23S rRNA.
- Match: **(i) 50S - (c) 23S**.

2. **30S Subunit**:
- Contains 16S rRNA.
- Match: **(ii) 30S - (a) 16S**.

3. **40S Subunit**:
- Contains 18S rRNA.
- Match: **(iii) 40S - (b) 18S**.

4. **60S Subunit**:
- Contains 5.8S rRNA (among others).
- Match: **(iv) 60S - (d) 5.8S**.

### Step 4: Compile the Matches
Now we can compile the matches:
- (i) 50S - (c) 23S
- (ii) 30S - (a) 16S
- (iii) 40S - (b) 18S
- (iv) 60S - (d) 5.8S

### Step 5: Select the Correct Option
Based on the matches we have made:
- **Correct Option: 2nd Option** (as it corresponds to the matches we have identified).

### Final Answer
The correct matches are:
- (i) 50S - (c) 23S
- (ii) 30S - (a) 16S
- (iii) 40S - (b) 18S
- (iv) 60S - (d) 5.8S

Thus, the correct option is **2nd option**.