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add_option() does not work in plugin wordpress

I have a custom plugin in wordpress. In this plugin I am trying to pass an array of values through add_option(). Like this:

$options = array(
   'option1' => $option1,
   'option2' => $option2,
   'option3' => $option3
);

add_option('options', $options);

Also, at the beginning of the plugin sheet, I include the option.php file:

require_once ABSPATH . '/wp-includes/option.php';

In the page template I try to get the values but I get nothing ( bool(false) ):

var_dump(get_option('options'));

Please tell me what am I doing wrong? Where am I making the mistake? Thanks!