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

Part (A): “On every hundred snake”

This part contains the error.

Rule:
After numbers like “hundred,” when used in this structure, the noun must be plural.

Correct form:
“On every hundred snake births”
or more naturally,
“For every hundred snake births”

Here, “snake” should be “snake births” (plural structure).

So Part (A) is incorrect because “snake” is singular and incomplete.

Part (B): “births, there is at least one”

This is correct.
“there is at least one variant” — singular verb agrees with “one.”

No error here.

Part (C): “variant with strange markings,”

Grammatically correct.

Part (D): “colours, or additional tails”

Grammatically correct.

Conclusion

The error is in Part (A).