Consider the following statements relating to mechanical properties of ceramics:
1. Tensile strength is theoretically high but in practice quite low.
2. Compressive strength is many times lower than tensile strength.
3. Shear strength is high.
4. Transverse strength is easy to ascertain.
Which of the statements given above are correct?
(a) 1 and 3 (b) 1 and 4
(c) 2 and 3 (d) 2 and 4