Following is the script that I used:
function sendEmails() {
var sheet = SpreadsheetApp.getActiveSheet();
var startRow = 3; // First row of data to process
var numRows = 9; // Number of rows to process
// Fetch the range of cells A2:B3
var dataRange = sheet.getRange(startRow, 2, numRows, 3);
// Fetch values for each row in the Range.
var data = dataRange.getValues();
for (var i in data) {
var row = data[i];
var emailAddress = row[0]; // First column
var message = row[1]; // Second column
var subject = 'Testing kr reyan Mukhtaarya';
MailApp.sendEmail(emailAddress, subject, message);
}
}