diff --git a/QA.md b/QA.md
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@@ -1,6 +1,8 @@
 What are your risk areas? Identify and describe them.
 
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+One of the crucial assumptions i have made is regarding transactionid in all sessions being the only proof that transaction has already taken place i.e. the product is actually 'sold'.
 
 QA Process:
 Describe your QA process and include the SQL queries used to execute it.
+
+Initially i tried to check the PK candidates in all tables