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Dropdown menu items extra space

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I am getting this extra space in all dropdowns I am creating in my app.
The code is :

dcc.Dropdown(
                id='batch-dropdown',
                options=[
                    {'label': '2017-2021', 'value': '17'},
                    {'label': '2018-2022', 'value': '18'},
                ],
                value='17',
                placeholder="Select Batch",
                style={'width': "35%",
                       'display': 'inline-block',
                       'verticalAlign': "middle",
                       },
                searchable=False
            ),

Anyone who can help me this issue?