Highest density is of ……….

Options

A. Ir
B. Os
C. Pb
D. Hg

Explanation

To determine which element has the highest density among the given options (sandhya, iridium, osmium, lead, and mercury), we can follow these steps:

### Step 1: Understand Density
Density is defined as mass per unit volume. The formula for density (D) is:
\[ D = \frac{mass}{volume} \]

### Step 2: Identify the Elements
The elements provided are:
1. Sandhya (not a recognized element, likely a distractor)
2. Iridium (Ir)
3. Osmium (Os)
4. Lead (Pb)
5. Mercury (Hg)

### Step 3: Research the Densities
We need to look up the densities of the recognized elements (iridium, osmium, lead, and mercury):
- **Iridium (Ir)**: Approximately 22.56 g/cm³
- **Osmium (Os)**: Approximately 22.59 g/cm³
- **Lead (Pb)**: Approximately 11.34 g/cm³
- **Mercury (Hg)**: Approximately 13.53 g/cm³

### Step 4: Compare the Densities
Now we compare the densities:
- Iridium: 22.56 g/cm³
- Osmium: 22.59 g/cm³
- Lead: 11.34 g/cm³
- Mercury: 13.53 g/cm³

### Step 5: Identify the Highest Density
From the comparison, we see that osmium has the highest density at 22.59 g/cm³.

### Conclusion
Thus, the element with the highest density among the options provided is **Osmium (Os)**.

---