Stating my opinion at the end of the discussion essay.

To illustrate what I mean:

Intro

Example thesis statement: In this essay, I will explore both sides of the argument and state my opinion.

B1

First argument topic sentence

Example

Explanation

B2

Second argument topic sentence

Example

Explanation

Conclusion

Summary

I agree with the second argument.

Is this acceptable?

I am asking this because I have been taught at college that you should always give your opinion in your thesis statement.