The correct option is A True
You will find different answer of this question in different sources.
According to some sources, battery is the arrangement of a number of cells which are connected in series.
But in standard books, it is given that it may have one or more than one cell connected in series. So, we will go with the definition of standard books.
So one source tells us that one cell can also be regarded as battery while other sources tell us that it should be more than one cell.
But here we will go with our standard book.