1 is associated with poor compliance because of the need for sustained treatment
2 may be combined with vitamin D supplementation
3 consists of calcium lactate as it is the only salt that can be used for oral administration.
A if 1, 2 and 3 are correct
B if 1 and 2 only are correct
C if 2 and 3 only are correct
D if 1 only is correct
E if 3 only is correct