The correct answer is (a) Chhattisgarh.
The Rajya Sabha, also known as the Council of States, is the upper house of the Parliament of India. It is composed of 245 members, 233 of whom are elected by the elected members of the legislative assemblies of the states and union territories, and 12 are nominated by the President of India. The number of elected members from each state is based on its population, with larger states having more members.
Chhattisgarh is a state in central India with a population of 27.9 million. It has 11 elected members in the Rajya Sabha.
Himachal Pradesh is a state in northern India with a population of 8.7 million. It has 3 elected members in the Rajya Sabha.
Jharkhand is a state in eastern India with a population of 3.3 million. It has 6 elected members in the Rajya Sabha.
Jammu and Kashmir is a state in northern India with a population of 12.5 million. It has 4 elected members in the Rajya Sabha.
Therefore, Chhattisgarh has the lowest number of elected members in the Rajya Sabha.