Explanation:

- Power of Impeachment:

- Rajya Sabha can participate in the impeachment of the President and judges.

- Vidhan Parishad (Legislative Council) has no such powers.

- However, this is not the *main* distinguishing feature.

- Indirect Election:

- Both Rajya Sabha and Vidhan Parishad members are elected indirectly.

- So, this is not a distinguishing feature.

- Nomination of Members:

- Rajya Sabha: 12 members nominated by the President for their expertise in arts, science, literature, and social service.

- Vidhan Parishad: Some members are also nominated, but the number and process differ.

- Not a unique distinguishing point.

- Tenure of Membership:

- Rajya Sabha: Permanent body, not dissolved; one-third members retire every 2 years, term is 6 years.

- Vidhan Parishad: Similar tenure system, permanent body, one-third retire every two years.

- Again, not unique to Rajya Sabha.

Correct Answer: None are very unique, but considering broad parliamentary powers, especially “Power of Impeachment” is mainly with Rajya Sabha, not Vidhan Parishad. However, usually, “Nomination of members” is chosen in other competitive exams where the *number and source* of nominated members set them apart.

But among the given logical differences, “Power of Impeachment” is the most distinctive at the national level.

Correct option: Option 1 – Power of Impeachment