We have, A Participates in the month which has an even number of days. A participates two persons after the one who likes Raipur. From the above condition, there are two possibilities. 
F participates in the odd number date but after A. D participates three persons before the one who participates immediately after the one who likes Pune. D does not participate in an even numbered date. A does not like Pune. From the above condition, case2 gets eliminated. 
The one who likes Delhi participates immediately before C. E likes neither Raipur nor punjab. The one who likes Punjab participated in the same month as E. Neither D nor E likes Ranchi. From the above condition, case1a gets eliminated. Case1 shows the final arrangement. 
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