Read the following statements and choose the correct option: 1. In frogs, nostrils are absent. 2. Eyes are bulged and covered by a nictitating membrane that protects them while in water. 3. A membranous tympanum receives sound signals. 4. Special venous connection between liver and urinary bladder as well as the kidney and lower parts of the body are present in frogs 5. The undigested solid waste moves into the cloac