### Question Asked by a Student from EXXAMM.com Team

Q 2641680523.

Assertion : Let A (vec i + vec j + vec k)  and B (vec i - vec j + vec k) be two points, then point P ( 2 vec i + 3 vec j + vec k) lies exterior to the sphere with AB as one of its deameters

Reason : If A and B are any two points and Pis a point in space such that vec(PA) * vec( PB) > 0 , then point  P lies exterior to the sphere with AB as one of its diameters.

A Both A and R individually true and R is the correct explanation of A
B Both A and R are individually true but R is not the correct explanation of A
C A is true but R is false
D A is false but R is true

#### HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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