Which of the following statements are included under Koch's postulates?

Statement (S): Mechanical vector merely transfers the infective stage of a parasite.

Reason (R): In this vector, a part of the development of parasite takes place before it gets transferred to another host.

Which of the following is true?

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Assertion : Pork should be properly cooked to avoid Taenia infection.

Reason : Pork of pig contains Hexacanth and cysticerci larvae.