Option B- Looking at the poster carefully, we have to find out the date when the show will be organised. The poster states- 'Vertical Limits Public School presents PUPPET SHOW on 26th January, 20XX...' The preposition 'on' is used to explain the day or date of the event. Hence, we can say that the show will be organised on 26th January. Thus the correct option is B - 26th January.
Option A and C are incorrect, as the poster clearly states 'on 26th January'. The dates 20th January and 11th January are not mentioned in the poster. Option D is incorrect as option B is the answer.