Which of the following is the major solute species in a solution of glutamic acid at $\mathrm{pH}$ $=4.3$ ? (Isoelectric point of glutamic acid is at $\left.{\mathrm{P}}^{\mathrm{H}}=5.6\right)$

In zwitterionic form, the pH of a given solution is 4.3 which is acidic i.e high $${\mathrm{H}}^{+}$$ concentration hence there will be an attack at the amine group due to the presence of lone pair hence major solute species in a solution is

Hence option A is the correct answer.