If \( P(3,2,-4), Q(5,4,-6) \) and \( R(9,8,-10) \) are collinear, t...

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If \( P(3,2,-4), Q(5,4,-6) \) and \( R(9,8,-10) \) are collinear, then \( R \) divides \( P Q \) in the ratio
(a) \( 3: 2 \) internally
(b) \( 3: 2 \) externally
(c) \( 2: 1 \) internally
(d) 2 : 1 externally
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