Consider the following in relation to the election of the members of the Parliament :

A. Lok Sabha members are elected directly on the basis of adult suffrage.

B. Rajya Sabha members are indirectly elected on a proportional representation basis by the elected members of the State Legislative Assemblies.

C. A few Rajya Sabha members are nominated by the Prime Minister for special knowledge.

D. Rajya Sabha members are allotted to each state based on the geographical area.

Which of the above statements are correct ?