Consider the following statements : I. PQ is parallel to RS. II. PR is perpendicular to QS. Which of the statements given above is/are correct ?
For the next two (02) items that follow : P(-2, -3, 5), Q(4, -1, 5), R(6, -4, 8) and S(2, -6, 10) are four points.
- A. I only
- B. II only
- C. Both I and II
- D. Neither I nor II ✓
Correct Answer: D. Neither I nor II
Explanation
Direction ratios of PQ are (6, 2, 0) and RS are (-4, -2, 2), which are not proportional. Dot product of PR (8, -1, 3) and QS (-2, -5, 5) is 4, not 0. Thus, both statements are false.
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