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If a+b-c = 12 and a^2+b^2+c^2=110, then ...

If a+b-c = 12 and `a^2+b^2+c^2=110`, then which among the following relations is true ?
यदि a+b-c = 12 और `a^2+b^2+c^2=110` है, तो निम्न में से कौन सा संबंध सही है ?
(p) ab+bc+ca = 3
(q)ab+bc-ca = 17
(r) ab-bc+ca = 17
(s) ab-bc-ca = 17

A

r

B

q

C

p

D

s

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