Match the properties given in Column I with the reansition elements given in Column II and select the correct answer using the code below the lists `:`
`{:(,"Column"I,,"Column"II,),(,("Property"),,("Transition elements"),),((a),"Highest oxidation state",,(p)" "Cr.,),((b),"Highest density",,(q)" "Os.,),((c ),"Element with maximum unparied electrons.",,(r)" "Tc.,),((d),"Radioactive transition element",,(s)" "Cu.,):}`
Code `:`

Options

A. `{:(,"(a)","(b)","(c)","(d)"),(,q,q,p,r):}`
B. `{:(,"(a)","(b)","(c)","(d)"),(,q,p,s,r):}`
C. `{:(,"(a)","(b)","(c)","(d)"),(,p,q,r,s):}`
D. `{:(,"(a)","(b)","(c)","(d)"),(,r,s,q,p):}`

Explanation

To solve the problem of matching the properties given in Column I with the transition elements in Column II, we will analyze each property and identify the corresponding transition element.

### Step-by-Step Solution:

1. **Identify the Highest Oxidation State (Property a)**:
- The highest oxidation state among transition elements is +8, which is exhibited by **Osmium (Os)**.
- **Match**: a → q (Osmium)

2. **Identify the Highest Density (Property b)**:
- The element with the highest density is also **Osmium (Os)**, which has a density of 22.57 g/cm³.
- **Match**: b → q (Osmium)

3. **Identify the Element with Maximum Unpaired Electrons (Property c)**:
- The element with the maximum number of unpaired electrons is **Chromium (Cr)**. Chromium has the electron configuration of [Ar] 3d⁵ 4s¹, resulting in 6 unpaired electrons.
- **Match**: c → p (Chromium)

4. **Identify the Radioactive Transition Element (Property d)**:
- The radioactive transition element is **Technetium (Tc)**, which is known to be the first radioactive element in the periodic table.
- **Match**: d → r (Technetium)

### Final Matches:
- a → q (Osmium)
- b → q (Osmium)
- c → p (Chromium)
- d → r (Technetium)

### Summary:
The correct matches are:
- a (Highest oxidation state) → q (Os)
- b (Highest density) → q (Os)
- c (Element with maximum unpaired electrons) → p (Cr)
- d (Radioactive transition element) → r (Tc)