# What is differential equation for deflection?

**Q. Which of the following is a differential equation for deflection?***- Published on 23 Sep 15***a.** dy / dx = (M/EI)

**b.** dy / dx = (MI/E)

**c.** d^{2}y / dx^{2} = (M/EI)

**d.** d^{2}y / dx^{2} = (ME/I)

**ANSWER: d**^{2}y / dx^{2} = (M/EI)