It would probably be easier to combine all the emails selected into one field.  Is there a limit to the number of notifications?  How are they being selected in the form?

There is one revert notification from an approver that will be split to the participants selected at the start of the process.

Also, the reviewers are selected in a drop down field on the business form prepopulated with the Users

If the users are selected in the first form, and there is a limit the max amount that can be selected, you could move all the email addresses into a single line field with a "," using a concatenate formula.  Then you can use that field in the Send To for any notification piece and it will use the same email addresses each time.  

Thanks Angela. But am not clear with your explanation. Also remember the emails must be dynamic because the form selecton changes all the time.

Are you saying the selection of those who need to be notified will be changed throughout the process?

Hello Angela. THis is the scenario...At the start of the process lets say i select 6 names from a drop down to fill a form and send for review. After the reviewer finishes his review, he reverts the form. Now how do i make sure that only the 6 that were selected previously will receive the revert? How do i configure the business process such that only the initially selected 6 people will receive the revert?

or that only those selected will receive the revert 

Does revert mean the form is being sent back to the form initiator?  Are the 6 names selected from a table or individual drop-down fields?  Are the 6 people receiving a task or an email?

Yes the revert means sent back for feedback.

The 6 names are selected from a drop down list. 

The 6 are receive a task with mail.notification. Since they reviewed a firm and sent it for approval, the approver can send it back with comments before giving approval.  

Note also that each time there is a review, the number of names selected can change. It may be 6 or 3 or 5. The important thing is that only the selected names should get the reverted form

I saw you started another post on this as well, and what Kevin and Zac are saying is the same.  If the reviewers are changing on each step, you need to capture all the email addresses of those selected in another field and use that as your Send to.  You can use a concatenate formula in a single line field and separate them by semi-colon, so your value becomes a cluster of email addresses.  I'm not sure if you drop down is in a table or free form though, that will make a difference.  If you are using a loop and it the approver is changing the original values, you may want to run it through workflow and null out the first selected values so its new each time.