Yes, you can place relevance on the sub-questions (rows) of Q2 to conditionally display them depending on the anwer to Q1.
See my answer to this post - www.limesurvey.org/forum/can-i-do-this-w...ltiple-choice#155214
See my answer to this post - www.limesurvey.org/forum/can-i-do-this-w...ltiple-choice#155214