Evolution of toothed birds occurred about ______ crore years ago.
A. 5.4 – 5.9
B. 5 – 6
C. 3.5
D. 7.1
Answer:A
Evolution of toothed birds occurred about ______ crore years ago.
A. 5.4 – 5.9 B. 5 – 6 C. 3.5 D. 7.1