‘P’ will be the first part of the given sequence as ‘the most common one’ is used in connection of ‘misconceptions’ referred in S1. ‘S’ will follow next as it makes a comparison with the ‘nonpoisonous’ snakes. ‘Q’ will come next because it talks about the other conception. ‘R’ will follow next as it gives the description of snakes negating the conception that they are slimy (as mentioned in the previous part). Hence, PSQR is the correct sequence. Thus, option (c) is correct.