First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element that is a main component of apatite family :

A

1402 kJ $$mol^{−1}$$

B

834 kJ $$mol^{−1}$$

C

1012 kJ $$mol^{−1}$$

D

947 kJ $$mol^{−1}$$