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# Excel/Data validation in EXCEL

Question
Col 1 has four enteries. Col 2 has dropdown for each of the four enteries. Upto this it is working fine. Now in col 3 I want to add further dropdown for the dropdown options of col 2. Please suggest the steps to it

Simplified answer. If the choices in col 2 are a, b, or c, then you can use this as the data validation rule. Choose List, then for the list enter this formula (which assumes the choices for "a" are in cells I1:I2, for b are in I3:I4, and for c are I5:I6):
=IF(B1="A",\$I\$1:\$I\$2,IF(B1="B",\$I\$3:\$I\$4,IF(B1="C",\$I\$5:\$I\$6)))
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#### Bob Umlas

##### Expertise

I`m a Microsoft Excel MVP (Most Valuable Professional) and have been since the inception of the program in 1995. I can answer every kind of Excel question except: API, Importing/exporting to other programs (powerpoint, word,...) Also check out my in-person training link at http://www.thumbtack.com/ny/new-york/excel-training/

##### Experience

Worked with MS Excel since version 0.99 (on the Mac!). Was contributing editor to Excellence Magazine, having written >300 articles. John Walkenbach said of me "I finally met someone who knows as much about Excel as I do."

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BA in math, Hofstra University, 1965

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Led sessions for the Convergence 2004-2006 seminar on Excel tips & tricks