Consider the statements a, b, c and d given below. Which one of the codes contains the correct statements only?1) Venn diagram is a clear method of notation.2) To diagram a standard form of a categorical proposition, three overlapping circles are drawn.3) To test a categorical syllogism, two overlapping circles are drawn.4) Venn diagram is a method of testing the validity of categorical syllogisms.

• A. 1 and 2 only
• B. 1, 2 and 4 only
• C. 1, 2, 3 and 4
• D. 1 and 4 only