Which of the following statement(s) is/are correct?

$1$. Contraries proposition can not be true at a time.

$2$. Two contrary propositions differ in quality.

Select the correct answer using the codes below: 

Which of the following statements is mutually contradictory?

(i) All flowers are not fragrant.
(ii) Most flowers are not fragrant.
(iii) None of the flowers is fragrant.
(iv) Most flowers are fragrant.

Choose the correct answer from the code given below:
Code:

Out of the following propositions two are related in such a way that these cannot be true together, but can be false at the same time. Identify such pair of propositions:

(i) Some students prefer vegetarian food.

(ii) Some students prefer non-vegetarian food.

(iii) All students prefer non-vegetarian food.

(iv) All students prefer vegetarian food.

Select the correct code:

Which of the following statement(s) is/are correct?

$1$. Two Sub-Contrary Propositions can be false at a given point in time.

$2$. Particular affirmative and Particular negative propositions are Sub-Contraries.

Select the correct answer using the codes below: 

Which of the following statements are mutually contradictory?

(i) All flowers are not fragrant.

(ii) Most flowers are not fragrant.

(iii) None of the flowers is fragrant.

(iv) Most flowers are fragrant.

Choose the correct answer from the code given below:

Code: