Which of these statements are correct?
(i) Webbed feet of penguins help them in swimming.
(ii) Hygrometer is used to measure rainfall.
(iii) Tusk of elephants acts as a nose and is used for picking up food.
(iv) Small ears of polar bear help to retain heat.
A(ii) and (iv)
B(i) and (iv)
C(i), (ii) and (iii)
DNone of these