Recall the rules:
1. Each sentence = 5 words (2 Bingoes, 1 Cingo, 2 Dingoes).
2. If Grumbs is used, Ihavitoo must also be used — and vice versa.
3. Koolodo can only be used if Lovitoo is present.
Now check each option:
Option (A): Grumbs and Harrumphs are the 2 Bingoes, Ihavitoo is given as the Cingo.
Since Grumbs is present, Ihavitoo must also be present somewhere — and it is, as the Cingo. No violation here.
Option (B): Harrumphs and Ihavitoo are given as the 2 Bingoes. This is a violation because Ihavitoo is also a Cingo word — it cannot be counted as a Bingo unless treated consistently by grammar rules. In the word classification, Ihavitoo is in both Bingoes and Cingoes, but here using it as a Bingo would prevent fulfilling the Cingo requirement properly without duplication. This violates the “exactly 2 Bingoes” with correct classification rule.
Option (C): Grumbs and Ihavitoo as Bingoes, Lovitoo and Nana as the Dingoes — satisfies the Grumbs–Ihavitoo pairing rule, Dingoes count is fine, Cingo can be another valid one. Possible.
Option (D): Metoo and Nana as Dingoes — possible if other positions filled properly.
Thus, only (B) causes an unavoidable grammar violation.
\(\boxed{\text{Correct Answer: (B)}}\)