dependent drop down not working for Model A1, A3, M3.

In my list the model number is A1, A3, A4 but when I use the dependent drop down list & select A1 model then drop down list only  show the result of A1 cell, not according the A1 Model.
Salim MollahAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Martin LissOlder than dirtCommented:
Please attach your workbook. You do that by clicking the 'Attach File' link that you'll find just below the text entry portion of a post like this one. You will then see a 'Choose File' button. Choose your file and then click the blue 'Upload File' button.
Salim MollahAuthor Commented:
Dear Martin Liss,

File attached & uploaded. I`m realy stuck on this, kindly help me.

Salim Mollah
Martin LissOlder than dirtCommented:
There's no attachment so it looks like you forgot to press the blue 'Upload File' button.
Ejgil HedegaardCommented:
Use this as validation formula
See sheet

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Salim MollahAuthor Commented:
Superb! this is now working, thanks a lot.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Excel

From novice to tech pro — start learning today.