The coach asked us to draw a straight ___ under the heading.

Explanation

The correct option is (b). The correct option to fill in the blank is (b) line. Explanation: The phrase “draw a straight line” is a fixed and commonly used expression. “Line” refers to a long, narrow mark or stroke drawn on a surface (Hindi meaning: रे खा). It fits the context of making a straight mark under a heading. Example: Please draw a straight line under the title. Why other options are incorrect: Option A: Lain – past participle of “lie” (to recline); it does not mean a drawn mark (लेटा हुआ). Option C: Lynn – typically a proper noun/name; not a suitable common noun here (नाम/विशेष संज्ञा). Option D: Lane – a narrow road or path; unrelated to drawing under a heading (गली/मार्ग). So the correct answer is (b)