Consider the following statements about planet Venus: 1. The Sun rises in the west and sets in the east on Venus because it rotates in a direction opposite to that of the Earth. 2. A ‘day’ on Venus is defined with reference to the apparent motion of the Sun across its sky as observed from the surface. 3. There is no distinct solid surface beneath its dense atmosphere. 4. Radar mapping is used to study the surface topography of Venus through its thick cloud cover. Which of the above statements are correct? (a) 1, 2, 3 and 4 (b) 1, 2 and 3 only (c) 1, 2 and 4 only (d) 3 and 4 only