UPSC | Prelims GS | 2026

The fourth naturally occurring instance of transmissible cancer discussed in the science article was found in:

  1. brown bullhead catfish
  2. Tasmanian devil
  3. dog
  4. clam

Answer

Correct Answer

brown bullhead catfish

Explanation

The report describes the fourth documented instance in brown bullhead catfish from Lake Memphremagog. Dogs, Tasmanian devils, and bivalves are discussed as other examples or comparisons, not the fourth instance.

Topics: biology, brown bullhead catfish melanoma, science and technology, transmissible cancers