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Which of the folloiwng conditions such t...

Which of the folloiwng conditions such that the line `(x-p)/l=(y-q)/m=(z-r)/n` lies on the plane `Ax+By+Cz+D=0 is/are correct? 1. `lp+mq+nr+D=0` 2. Ap+Bq+Cr+D=0` 3. Al+Bm+Cn=0` Select the correct answer using the codes given (A) 1 only (B) 1 and 2 (C) 1 and 3 (D) 2 and 3

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