How many electrons, protons and neutrons are present in X+ , if atomic number of X is 19 and its mass number is 39

Question

$\begin{array}{1 1} a. E=19, P=19, N= 20 \\ b. E=18, P=19, N= 20 \\ c. E=18, P=19, N= 19 \\ d. E=19, P=20, N= 20 \end{array} $