Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The corresponding letter of that part is the answer. If the given sentence is correct as it is, then choose option ‘No error’ as the answer response. (Ignore errors of punctuation, if any).

On every hundred snake (A)/ births, there is at least one (B)/ variant with strange markings, (C)/ colours, or additional tails (D)/ no error (E).

Correct option is A

The error lies in part (A) of the sentence. The error in the original sentence is due to the incorrect use of the word " hundred" instead of " hundredth."
"Hundred" is a numerical quantity, while "hundredth" indicates a numerical order. In the context of the sentence, " hundredth" is the appropriate word to use because it denotes that the variant snake occurs once in every 100 snakes, or every hundredth snake.
Hence, the correct sentence formed will be “In every hundred snake births, there is at least one variant with strange markings, colours, or additional tails.”