Hi Abhilasha,

One way is, you can write trigger and call the batch apex whenever needed.

Here is the code.. with test class...

--Trigger--

trigger reginfoname on reginfo__c (before insert,after update){
    if(trigger.isBefore){
        if(trigger.isInsert){
        for(reginfo__c rg:Trigger.new){
            if(rg.ToBeDelete__c == true){
               rg.addError('You cannot insert when CheckBox is true');

            }
        }
       }
    }
    if(trigger.isAfter){
        if(trigger.isUpdate){
        for(reginfo__c rg:Trigger.new){
            if(rg.ToBeDelete__c == true){
              batchtodelregInfo bt=new batchtodelregInfo();
              Database.ExecuteBatch(bt);

            }
        }
       }
    }
}


--Batch Apex---

Global class batchtodelregInfo implements Database.batchable<sObject>{
    global Database.QueryLocator start(Database.BatchableContext BC){
       string query='select id,name,ToBeDelete__c from regInfo__c where ToBeDelete__c=true';
       return Database.getQueryLocator(query);
    }
    global void execute(Database.BatchableContext BC,List<regInfo__c> scope){
        List<regInfo__c> scList = new List<regInfo__c>();
        for(segInfo__c sc:scope){
            
                scList.add(sc);
            
        }
        delete scList;
    }
    global void finish(Database.BatchableContextatchable BC){
    }
}

--Test Class--

@isTest
public class batchtodelregInfo_Test{
    private static Testmethod void batchtodelregInfoMethod(){
        regInfo__c ri=new regInfo__c(Name='Test reginfo',ToBeDelete__c=false);
        insert ri;
        ri.ToBeDelete__c = true;
        update ri;
        batchtodelregInfo bt=new batchtodelregInfo();
        Test.startTest();
        Database.ExecuteBatch(bt);
        Test.stopTest();
    }
  }


Let me know is that helpfull