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I : If three points A, B and C have posi...

I : If three points A, B and C have position vectors (1, x, 3), (3, 4, 7) and (y, -2, -5) respectively and if they are collinear, then (x, y) = (2, -3)
II : If a = i + 4j, b = 2i - 3j and c = 5i + 9j then c = 3a + b

A

only I is true

B

only II is true

C

both I and II are true

D

neither I nor II are true

Text Solution

Verified by Experts

The correct Answer is:
C
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