How to add custom select options in a custom admin form

I am creating a Custom From in admin and want to load the custom select option in the form as a select field options.

Below is my code :
app/code/Vendor/Module/Block/Adminhtml/Grid/Edit/Form.php

<?php

namespace VendorModuleBlockAdminhtmlGridEdit;
 
 
/**
 * Adminhtml Add New Row Form.
 */
class Form extends MagentoBackendBlockWidgetFormGeneric
{
    /**
     * @var MagentoStoreModelSystemStore
     */
    protected $_systemStore;
 
    /**
     * @param MagentoBackendBlockTemplateContext $context
     * @param MagentoFrameworkRegistry             $registry
     * @param MagentoFrameworkDataFormFactory     $formFactory
     * @param array                                   $data
     */
    public function __construct(
        MagentoBackendBlockTemplateContext $context,
        MagentoFrameworkRegistry $registry,
        MagentoFrameworkDataFormFactory $formFactory,
        MagentoCmsModelWysiwygConfig $wysiwygConfig,
        VendorModuleModelStatus $options,
        array $data = []
    ) 
    {
        $this->_options = $options;
        $this->_wysiwygConfig = $wysiwygConfig;
        parent::__construct($context, $registry, $formFactory, $data);
    }
 
    /**
     * Prepare form.
     *
     * @return $this
     */
    protected function _prepareForm()
    {
        
        $dateFormat = $this->_localeDate->getDateFormat(IntlDateFormatter::SHORT);
        $model = $this->_coreRegistry->registry('row_data');
        $form = $this->_formFactory->create(
            ['data' => [
                            'id' => 'edit_form', 
                            'enctype' => 'multipart/form-data', 
                            'action' => $this->getData('action'), 
                            'method' => 'post'
                        ]
            ]
        );
 
        $form->setHtmlIdPrefix('question_');
        
        $fieldset->addField(
            'name',
            'text',
            [
                'name' => 'name',
                'label' => __('NAME'),
                'id' => 'name',
                'title' => __('NAME'),
                'class' => 'required-entry',
                'required' => true,
            ]
        );

            $fieldset->addField(
                'email',
                'text',
                [
                    'name' => 'email',
                    'label' => __('Email'),
                    'id' => 'email',
                    'title' => __('Email'),
                    'class' => 'required-entry',
                    'required' => true,
                ]
            );
        

        $fieldset->addField('is_answered', 'select', 
           [
              'name' => 'is_answered',
              'label' => __('Status'),
              'options' => ['1' => __('Pending By Seller'), '0' => __('Pending By Admin')],
              'required' => true,
           ]);

        $form->setValues($model->getData());
        $form->setUseContainer(true);
        $this->setForm($form);
 
        return parent::_prepareForm();
    }
}

I want to load custom data(email) entries from custom table in the email field as a dropdown in the form.