A point P in the free space having co-ordinate (C, 0.4, 0.3) and the straight line joining it to origin (O) is of length r unit, if r = 1 unit, then (Taking 7 = OP) (A) Value of F.j is 0.3 unit (B) Value of C is 0.87 unit (C) Scalar product of i and (10] 10K) is 7 square units (D) The angle between r and 37 - 4k is 90°