Explanation

"For" indicates purpose or reason.

The phrase "for your safety" means to ensure you stay safe.

Explanation

 A hundred rupees is the price of this pen.

"Hundred rupees" refers to a singular amount of money, which is treated as a singular noun.

So the correct verb is "is

Explanation

 The phrase "many a girl" is singular in form and meaning ("many girls, each one individually").

It requires a singular verb, so "wishes" is correct.

Explanation

 The phrase "many a girl" is singular in form and meaning ("many girls, each one individually").

It requires a singular verb, so "wishes" is correct.

Explanation

 The word "means" (as in income or resources) is a plural noun despite its singular appearance.

So the correct verb is "are"

Explanation

Our customs and traditions are our essence.

The subject "custom and tradition" is plural, as it refers to two things.

Explanation

 The correct form here is the gerund "quarreling" (verb + -ing) to show an ongoing or repeated action.

"Ali likes his brothers quarreling all the time" means he enjoys watching them argue (though odd, it's grammatically correct).

Explanation

The correct idiom is "put on airs", which means to act superior or pretend to be better than others.

"Airs" is plural and fits the idiom correctly.

Explanation

The Scissors' handle just snapped off.

Scissors is a plural noun (even though it refers to a single object).

To show possession for a plural noun ending in s, we add only an apostrophe: Scissors' handle.

Explanation