Which of the following is a correct example of the plural possessive case a men's plans b. it's place c. stone's throw d. women's plans

Based on the answer choices given:

there are 2 (TWO) correct answers:

[A] men's plans ; AND:
[D] women's plans .

However, if you meant to write the answer choices as:

(a) men's plans; 
(b) it's place ;
(c) Stone's throw;
(d) woman's plans ;

than the answer would be: [A]: men's plans .

Note: "woman" is singular; so "woman's plans" would be "SINGULAR possessive";

whereas:  "women" is plural (more than one WOMAN)—the plural of "woman" is "women"; so "women's plans" would be "PLURAL possessive".

Likewise:

"man" is singular; so "man's plans" would be "SINGULAR possessive";

whereas:  "men" is plural (more than one MAN)—the plural of "man" is "men"; so "men's plans" would be "PLURAL possessive".

Hope this explanation helps!

To create unity throughout the poem