Consider the following statements regarding Buckminsterfullerene ( C ₆₀ ): (a) It contains 20 six-membered rings and 12 five-membered rings. (b) All carbon atoms in it undergo sp ² hybridization. (c) It is the only pure form of carbon because it has a smooth structure without dangling bonds. (d) Six-membered rings are fused only to other six-membered rings, while five-membered rings are fused to both five and six-mem

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Statement (a) is correct: Buckminsterfullerene ( C ₆₀ ) consists of 20 six-membered rings and 12 five-membered rings. Statement (b) is correct: All carbon atoms in C ₆₀ are equivalent and undergo sp ² hybridization. Statement (c) is correct: Fullerenes are the only pure form of carbon because they have a smooth, closed cage structure without any dangling bonds. Statement (d) is incorrect: According to NCERT, a six-membered ring can fuse with both six-membered and five-membered rings, whereas a five-membered ring ca