(a) Pohela Baishakh is undoubtedly the most celebrated festival in Bangladesh. (Complex) (b) It is the first day of the Bengali year when the city roads get so jam packed. (Simple) (c) Almost everyone enjoys the day in his own way. (Passive) (d) Although I do not like gathering, I enjoy the activities of this day. (Compound) (d) Although I do not like gathering, I enjoy the activities of this day. (Compound)