Consider the following statements regarding material:
1. In micro structure external form of the crystal may reflect the internal symmetry of atom.
2. Electronic structure is arrangement of electrons in different orbit of atom.
3. A crystal is formed by a non repeating cell in uni-direction.
4. Nuclear structure can be studied by Mossbauer studies.
Which of these statements are correct?
(a) 1,2 and 3 (b) 1, 2 and 4
(c) 1,3 and 4 (d) 2,3 and 4