Read the following information carefully and answer the questions that follow:
Six lectures A, B, C, D, E and F are to be organised in a span of seven days from Sunday to Saturday, only one lecture on each day in accordance with the following:
(i) A should not be organised on Thursday
(ii) C should be organised immediately after F
(iii) There should be a gap of two days between E and D.
(iv) One day there will no lecture (Friday is not that day). Just before that day D will be organised.
(v) B should be organised on Tuesday and should not be followed by D.
How many lectures are organised between C and D.