Looking on the internet deeply has found these results:

Which class are you in is the most popular phrase on the web.

In which class are you in 117,000 results on the web	Which class are you in 14,040,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Classification If you use the EuroLocarno terminology, you will automatically see which class the product belongs to. The women in my morning class are committed. Suzan, which class are we supposed to communicate to? Guess which class I signed up for. Circumstances in which class or type ratings are required Which class are you in this year? Those in first class are English and Irish. They knew which class he's in, who his teacher is.	Suzan, which class are we supposed to communicate to? Which class are you in? I'm asking you which class you are in. Regardless of which class you are travelling in Which class are you in this year? Which class are you in? you can enjoy the comfort of the First Class Lounges of the oneworld airline partners. And you are entitled to a range of benefits, which are provided according to the following oneworld tier levels, no matter which cabin class you are flying in:

In which class are you in

117,000 results on the web

Which class are you in

14,040,000,000 results on the web

More popular!

Classification If you use the EuroLocarno terminology, you will automatically see which class the product belongs to.
The women in my morning class are committed.
Suzan, which class are we supposed to communicate to?
Guess which class I signed up for.
Circumstances in which class or type ratings are required
Which class are you in this year?
Those in first class are English and Irish.
They knew which class he's in, who his teacher is.

Suzan, which class are we supposed to communicate to?
Which class are you in?
I'm asking you which class you are in.
Regardless of which class you are travelling in
Which class are you in this year?
Which class are you in?
you can enjoy the comfort of the First Class Lounges of the oneworld airline partners.
And you are entitled to a range of benefits, which are provided according to the following oneworld tier levels, no matter which cabin class you are flying in: