Which of the following statement are true about Rana tigrina?

(i) The most common species of frog found in India is Rana tigrina.

(ii) In peak summer frog take shelter in deep burrows to protect them from extreme heat, this is called as hibernation.

(iii) In peak winter frog take shelter in deep burrows to protect them from extreme cold, this is called an aestivation.

(iv) The frog never drinks water but absorb it through the skin.

(v) Male frogs can be distinguishes by the presence of vocal sacs and a copulatory pad on the first digit of the hind limbs.