The milk snake and coral snake resemble each other in their _________ .
The passage mentioned above states one of the true wonders of nature, that of defending oneself by pretense or mimicry. The fact that makes it even more wonderful is that it is performed by reptiles. Batesian mimicry is what the passage talks about; a trick used by harmless reptiles to protect themselves.
In the second line of the passage, 'the harmless...........coral snake', a factor of resemblance is mentioned between the milk snake and the coral snake. While the coral snake is poisonous, the milk snake is harmless and is devoid of poison as well. But, they have a similar banded appearance which makes them look alike and at times, one may mistake one for the other.
Thus, with reference to the second line, Option B is the correct answer. The other option like drinking milk is common amongst the snakes, whether poisonous or not. Poison fangs are not present in the milk snake, while the outlook for both the snakes is different, making them the wrong answers.