Which of the following sets of characters represent that of eukaryotic cytosolic ribosomes ?

Options

A. 80 S (30S, 60 S), (16S r -RNA, 23S , r-RNA and 5S r-RNA
B. 70 S (30S, 50 S), (16S r - RNA, 23S, r-RNA and 5S r -RNA
C. 80S(40 S, 60 S), (18S r-RNA, 28 S, r - RNA, 5.8S r - RNA and 5S r -RNA
D. 70 S (40S, 50 S), (18S r-RNA, 28S, r-RNA, 58S r - RNA and 5S r-RNA)

Answer

To determine which set of characters represents eukaryotic cytosolic ribosomes, we need to analyze the options provided and understand the characteristics of eukaryotic ribosomes.

### Step-by-Step Solution:

1. **Understand Ribosome Structure**:
- Eukaryotic ribosomes are known as 80S ribosomes, which consist of two subunits: a larger subunit (60S) and a smaller subunit (40S).

2. **Identify the Options**:
- Option A: 80S with unspecified subunits
- Option B: 70S with 30S and 50S subunits
- Option C: 80S with 40S and 60S subunits
- Option D: 70S with 40S and 50S subunits

3. **Evaluate Each Option**:
- **Option A**: 80S is correct, but without specifying the subunits, we cannot confirm it represents eukaryotic ribosomes.
- **Option B**: 70S ribosomes are characteristic of prokaryotes, not eukaryotes.
- **Option C**: 80S with 40S and 60S subunits is correct and matches the known structure of eukaryotic ribosomes.
- **Option D**: 70S ribosomes again indicate prokaryotic ribosomes.

4. **Conclusion**:
- The only option that accurately describes eukaryotic cytosolic ribosomes is **Option C: 80S with 40S and 60S subunits**.

### Final Answer:
**Option C: 80S with 40S and 60S subunits.**