The Swaran Singh Committee recommended the addition of Fundamental Duties to the Constitution of India. These duties serve as a reminder to citizens that while they enjoy their rights, they also have certain responsibilities. Fundamental Duties were included in the Constitution by the 42nd Amendment in 1976.

Option 1, the Doctrine of Pleasure, defines the tenure of those employed under the government. This power is at the pleasure of the President or Governor, but it wasn’t a recommendation of the Swaran Singh Committee.

Option 3, the nomination of the Anglo-Indian members to Lok Sabha, was present since the inception of the Indian Constitution and wasn`t suggested by Swaran Singh Committee.

Option 4 refers to the impeachment of the President, it also existed from the beginning in the Indian Constitution so it wasn`t a recommendation by the Swaran Singh Committee related to this.

In summary, Fundamental Duties is the right answer as it was a unique recommendation of the Swaran Singh Committee.