To read specific number of rows from a CSV file, which argument is to be given in read_csv() ?

1. rows = <n>
2. nrows = <n>
3. n_rows = <n>
4. number_rows = <n>

To skip first 5 rows of CSV file, which argument will you give in read_csv() ?

1. skiprows = 5
2. skip_rows = 5
3. skip = 5
4. noread = 5

While reading from a CSV file, to use a column's values as index labels, argument given in read_CSV() is :

1. index
2. index_col
3. index_values
4. index_label

While writing a DataFrame onto a CSV file, which argument would you use in to_csv() for NaN values' representation as NULL ?

1. NaN = NULL
2. na_rep = NULL
3. na_value = NULL
4. na = NULL