Which of the following adaptations are shown by kangaroo rats? (i) They possess blubber to insulate body. (ii) They need to drink lot of water and breathe at a slow rate to conserve water. (iii) They excrete very concentrated urine. (iv) They undergo aestivation to cope with heat.

• A. (iii) and (iv) only
• B. (i), (iii) and (iv) only
• C. (ii), (iii) and (iv) only
• D. (ii) and (iii) only