There are no restrictions are available regarding the use of markers in the NID DAT examination. So you can obvious carry these markers and use it. Its completely your choice. The things you must not forget:

• HB PENCILS OF DIFFERENT SHADES
• color pencils
• SCALE
• ERASER & SHARPNER

For NID DAT Do's and Don't visit the link below:

https://design.careers360.com/articles/10-dos-and-donts-for-nid-dat

For NID DAT preparation tips, visit the link below:

https://design.careers360.com/articles/how-prepare-for-nid-dat

I hope this answer helps. All the very best for your future endeavors!