Figure shows a closed dotted surface which intersects a conducting uncharged sphere. If a positive charges is placed at the point $P$, the flux of the electric field through the closed surface

Find the flux of the electric field through a spherical surface of radius R due to a charge of $10-7C$ at the centre and another equal charge at a point 2R away from the centre (figure 30-E2).the point P, the flux of the electric field through the closed surface

(a) will remain zero (b) will become positive

(c) will become negative (d) will become undefined .