Question

This bone of skull is modified into incus in the middle ear

• A. Lacrimal
• B. Quadrate
• C. Articular
• D. Hyomandibular

Hint:

Remember: articular → malleus, quadrate → incus, hyomandibular → stapes (in some lineages).

Answer 1

The Correct Option is B

• In the evolution of mammals from reptilian ancestors the quadrate bone of the lower jaw became the incus of the middle ear.
• The articular bone became the malleus; hence option (3) (articular) corresponds to malleus, not incus.
• Therefore the correct answer is (2) Quadrate.