Delhi : On the resignation of Election Commissioner Arun Goel, Rajya Sabha MP Kapil Sibal says, “It surely is (surprising). If at the cusp of an election, which is just a couple of months away, you resign – obviously there is something serious on the basis of which he must have resigned. I can’t possibly speculate that reason but obviously there is some element of difference of opinion, especially when his term was still not over.”