Venn diagram is a kind of diagram to

Which of the codes given below contains only the correct statements?
Statements:
(i) Venn diagram is a clear method of notation.
(ii) Venn diagram is the most direct method of testing the validity of categorical syllogisms.
(iii) In Venn diagram method the premises and the conclusion of a categorical syllogism is diagrammed.
(iv) In Venn diagram method the three overlapping circles are drawn for testing a categorical syllogism.

Given below is a diagram of three circles A, B and C over-lapping each other? The circle A represents the class of honest people, the circle B represent the class of sincere people and circle C represents the class of politicians. p, q, r, s, U, X, Y represent different regions. Select the code that represents the region indicating the class of honest politicians who are not sincere.

Namita and Samita are brilliant and studious. Anita and karabi are obedient and irregular. Babita and Namita are irregular but brilliant. Samita and Kabita are regular and obedient. Who among them is/are brilliant, obedient, regular and studious?

Ananaya and Krishna can speak and follow English. Bulbul can write and speak Hindi as Archana does. Archana talks with Ananya also in Bengali. Krishna can not follow Bengali. Bulbul talks with Ananya in Hindi. Who can speak and follow English, Hindi and Bengali?

Yadav, Arjun, Rajesh and Kamal play cricket. Rajesh and Kamal play tennis but do not play football. Yadav does not play Badminton but play golf. Arjun does not play tennis. Kamal sometimes plays Badminton. Who does play only cricket ?

Given below is a diagram of three circles A, B & C inter-related with each of Indians. The circle B represents the class of scientists and circle C represents the class of politicians. p,q,r,s... represent different regions. Select the code containing the region that indicates the class of Indian scientists who are not politicians.