Which of the following statements are correct?(A) Electrostatic lines…

The correct answer is Option (3) → (A), (B) and (C) only

An electric field line is a curve whose tangent at every point gives the direction of the field there.

(A) Electrostatic lines of force may be curved or straight in an electric field. — Correct. They are straight for a single point charge or between parallel plates, and curved for a dipole.

(B) Number of lines of force per unit perpendicular area represents the intensity of the electric field at the point — Correct. The density of field lines is a measure of the field strength: the lines are crowded where the field is strong.

(C) Two electric field lines can not intersect each other. — Correct. At a crossing point the field would have two directions, which is impossible.

(D) Electric field lines are directed from negative to positive charge for an electric dipole. — Incorrect. Field lines always start on a positive charge and end on a negative charge, so for a dipole they go from the positive to the negative charge.

NCERT (2026-27):
Electric Field Lines – “… An electric field line is, in general, a curve drawn in such a way that the tangent to it at each point is in the direction of the net field at that point.”

Electric Field Lines – “… Now the magnitude of the field is represented by the density of field lines. … So if one wishes to estimate the density of field lines, one has to consider the number of lines per unit cross-sectional area, perpendicular to the lines.”

Electric Field Lines – “… (i) Field lines start from positive charges and end at negative charges. … (iii) Two field lines can never cross each other.”