Answer: First option is correct.
Step-by-step explanation:
Since we have given that
Complex number is the number which contains real number along with imaginary number in the form of a+bi.
It is shown by "Argand plane" in which x-axis represents real number and y-axis represents imaginary number .
Hence, according to option,
4+3i is the only complex number as it has one real number a = 4 and one complex number b =3.
Hence, First option is correct.