What are the modifications that are observed in birds that help them fly?
Assertion (A): Vertebrates show different reproductive strategies. Reason (R): Birds are viviparous while mammals are mostly oviparous.
Correct answer: C — If assertion is true but reason is false.
NCERT confirms different reproductive strategies exist (Assertion true). However, NCERT states “They are mostly oviparous” for birds and “They are viviparous with few exceptions” for mammals. The Reason swaps these - birds are oviparous (lay eggs), mammals are viviparous (live birth).
MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.