@ramraj, To save you some time, you might want to give the following form definition a try:
---
form:
name: contact
fields:
topic:
type: select
options:
'marketing@mysite.com': General information
'sales@mysite.com': Sales information
buttons:
submit:
type: submit
value: Submit
process:
email:
subject: 'Site Contact Form'
body: "{% include 'forms/data.html.twig' %}"
to: '{{ form.value.topic|e }}'
---