Which one of the following could be an AutoCad drawing file? (a) DWG.PLAN (b) PLAN.DWG (c) DRAW.FLE (d) FILE.TXT

the extension of the cad file regularly DWG

so the answer is : 

(b) plain.dwg

.dwg is for autocad, .dxf is also used by autocad

.txt is for text files

.fle is used by scanners

so options (b) is correct

the answer

plan.dwg

The name of the file and its extension

An extension autocad file

The dwg

Or dxf

DWG is a extension for Auto CAD drawings. Extension comes later i.e after the name of the file. .TXT is a extension for text file and .FLE is a extension for scanner file.

Answe: (b) PLAN.DWG 

(b) plan.dwg it is the right answer but since the criteria is to write minimum 25 characters i am writing this sentence to fulfill this requirement

Option B is the correct choice.

answer is choice (B) plan.DWG

Thanks for the invite. Sorry, the question is out of my field.

AutoCAD’s most well-known file extensions: DWG and DXF. so here answer is option B

plan.dwg is the autocad drawing file thanks for the invite