Hi Abhisek,
You can’t, because Google Maps only accept country as a filer. So you can filter for only countries. For this refer the below link.
For india change the below line from
var options = { componentRestrictions: { country: 'MY'} };
to
var options = { componentRestrictions: { country: 'IN'} };
If you want to search only cities then use the below code.
var options = { types: ['(cities)'], componentRestrictions: { country: 'IN'} };