This graph shows the probability of finding the electron within shell at various distances from the nucleus (radial probability). The curve shows the maximum, which means that the radial probability is greatest for a given distance from the nucleus. This distance is equal to Bohr's radius =a0​(a) It is for 2s-orbital.(b) It is radial wave function for 1s.(c) Correct(d) Probability cannot be zero at a certain distance from nucleus.