If $$a + b - c = 12  and  a^2 + b^2 + c^2 = 110$$, then which among the following relations is true ?
(p) ab + bc + ca = 34,
(q) ab + bc - ca = 17,
(r) ab - bc + ca = 17,
(s) ab - bc - ca = 17

A

(p)

B

(s)

C

(r)

D

(q)