The correct answer is option 'D' - Rajnath Singh Committee.

The high-level committee chaired by Union Home Minister Rajnath Singh has recently approved financial assistance to several flood-affected states in India. Let's delve into the details of this committee and its decisions.

1. Introduction to the Rajnath Singh Committee:
- The committee is a high-level body constituted by the Union Government to address issues related to natural calamities, including floods.
- It is headed by Rajnath Singh, who is the Union Home Minister of India.

2. Objective of the Committee:
- The primary objective of the committee is to assess the damage caused by floods and provide financial assistance to the affected states.
- The committee determines the quantum of funds required for immediate relief, rehabilitation, and reconstruction activities.

3. Recent Decision:
- The committee, in its recent meeting, approved financial assistance to several flood-affected states.
- The exact details of the assistance provided, including the amount and specific states, have not been mentioned in the question. However, it can be inferred that the committee has taken into account the needs of various states grappling with flood-related issues.

4. Importance of Financial Assistance:
- Floods often result in extensive damage to infrastructure, loss of lives, and disruption of normal life.
- Financial assistance from the Union Government helps the affected states in providing immediate relief to the affected population, undertaking rehabilitation measures, and rebuilding damaged infrastructure.
- The assistance can include funds for relief camps, medical aid, food and essential supplies, repair of roads and bridges, reconstruction of damaged houses, etc.

5. Role of the Union Home Minister:
- As the chairperson of the committee, Rajnath Singh plays a crucial role in overseeing the decision-making process and ensuring prompt assistance to the flood-affected states.
- The Union Home Minister is responsible for coordinating with various ministries and departments to mobilize resources and provide necessary support.

In conclusion, the high-level committee chaired by Union Home Minister Rajnath Singh has approved financial assistance to several flood-affected states. This assistance aims to provide immediate relief and support the affected states in their recovery and rehabilitation efforts.