Select the option that will improve the highlighted part of the given sentence. In case no improvement is needed, select 'No improvement required'.
Either you and my sister is involved in this crime.

Correct option is C

The correct substitution of the highlighted words is (c) you or my.
Explanation: The correlative conjunction “Either...or” is used to connect two singular subjects or alternatives.
The sentence should read: “Either you or my sister is involved...”
· "Either...and" is grammatically incorrect.
· Also, "mine" is a possessive pronoun, but we need a possessive adjective "my" here before the noun "sister".
Grammatical rule used:
Use “either...or” to connect two options, and the verb should agree with the subject closest to it.
Example: Either Rahul or his brothers are going.
Either she or I am to blame.