Consider the following statements.
1. All valid arguments have only true premises.
2. A sound argument must be valid.
3. An argument with a false conclusion can't be valid.
4. All arguments with true conclusion are valid.
Which of the following statements is/are correct?

What is said to be the building blocks of our reasoning?

A. Proposition

B. Statement

C. Argument

D. Explanation

What do you mean by a term which is undistributed?

A. Excellence of some members of a class

B. Exclusion of some members of a class

C. Exclusion of many members

D. Inclusion of many members

The subaltern of the proposition 'Some scientists are mathematicians' are

A. Some scientists are not mathematicians

B. No scientists are mathematicians

C. All scientists are mathematicians

D. None of the above

Validity and invalidity deals with
1. Arguments
2. Deductieve Arguments
3. Inductive Arguments
4. Statements
Select the correct answer:

A. 1 and 3

B. 1 and 2

C. 2 and 3

D. 1 and 4