Which of the following are absent in frog ?
a) Diaphragm
b) Ribs
c) Loop of Henle in nephron
d) Cochlea in internal ear
1) a,b and c
2) b,c and d
3) a,c and d'
4) a,b,c and d
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b. Ribs, c. Loop of Henle in nephron, d. Cochlea in internal ear.
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