def convert_content_type_to_extension(content_type):
    """Convert image extension to Content-Type

    Args:
     content_type: Content-Type
    Returns:
        str: extension

    """
    if content_type == 'image/jpeg':
        extension = 'jpg'
    elif content_type == 'image/png':
        extension = 'png'
    elif content_type == 'image/gif':
        extension = 'gif'
    else:
        extension = False
    return extension
