Which of the following is aromatic? GENERAL ORGANIC CHEMISTRY

For the compound to be aromatic, there are 3 conditions which are written as follows- 1. The compound should be cyclic and planar 2. It should have conjugated ring system with alternate double bonds. 3. It should have (4n + 2) electrons, where n is an integer. Only following compound satisfies all the criteria, thus it is aromatic. For option (a), furan, the lone pair in oxygen atom is involved in resonance. Hence, it satisfies 4n+2 rule. 4n + 2 = 6 Therefore, n = 1 Thus, the correct option is (a) i.