How to merge two lists in python?

I have the following two lists:

lista = ['a', 'b']
listb = ['c', 'd']

And I want the output list like this:

res = [['a', 'c'], ['b', 'd']]

My solution is

arr = np.array([lista, listb]).T
res = arr.tolist()

Is there a simpler way to do it?

>Solution :

[list(a) for a in zip(lista, listb)]

Whether this is simplier might be subjective, but it is one of the options for sure.