The equation of a straight line which makes an angle $45^{\circ}$ with the $x$-axis with $y$-intercept 101 units is :

• A

  $10 x+101 y=1$
• B

  $101 x+y=1$
• C

  $x+y-101=0$
• Correct answer
  D

  $x-y+101=0$

Hence, the correct answer is option: 'D'.