Which one of the following sentences contains an incorrect usage of the singular possessive?
a. mary was dominant among jesus disciples
b. icarus's fate was sealed when he approached the sun
c. the alpha male is often pack's lead
d. the north forty has always been my family's land

A.

Explanation:

A singular possessive noun is created by adding apostrophe (') to the noun.  This is done so in order to show the possession of the noun.

But to use apostrophe to create singular noun possession there are certain grammatical rules.

If a singular noun is ending with 's' then apostrophe can be added after with the word without adding 's' or with adding 's'. Both ways are correct.

In option A, there is no possession shown. And the correct usage of singular possession for option A would be "Mary was dominant among Jesus' disciples.

So, the correct answer is Option A.

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